Siegfried Carl

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All published works

Action	Title	Year	Authors
+	Quasilinear parabolic variational-hemivariational inequalities in $ \mathbb{R}^N\times (0, \tau) $ under bilateral constraints	2025	Siegfried Carl
+	Parabolic double phase obstacle problems	2024	Siegfried Carl Patrick Winkert
+	Global $$L^\infty $$-estimate for general quasilinear elliptic equations in arbitrary domains of $${{\mathbb {R}}}^N$$	2024	Siegfried Carl Hossein Tehrani
+	Elliptic p-Laplacian systems with nonlinear boundary condition	2024	Franziska Borer Siegfried Carl Patrick Winkert
+ PDF Chat	Decay estimates for quasilinear elliptic equations and a Brezis–Nirenberg result in $$D^{1,p}({\mathbb R}^N)$$	2024	Siegfried Carl Hossein Tehrani
+	Elliptic $p$-Laplacian systems with nonlinear boundary condition	2024	Franziska Borer Siegfried Carl Patrick Winkert
+ PDF Chat	Quasilinear noncoercive bilateral hemivariational inequalities in $D^{1, p}(\mathbb{R}^N)$: Existence and compactness results	2024	Siegfried Carl
+	Global $L^\infty$-estimate for general quasilinear elliptic equations in arbitrary domains of $\mathbb{R}^N$	2023	Siegfried Carl Hossein Tehrani
+	Multi-valued variational inequalities for variable exponent double phase problems: comparison and extremality results	2022	Siegfried Carl Vy Khoi Le Patrick Winkert
+	Multi-valued variational inequalities in unbounded domains: existence, comparison and extremal solutions	2021	Siegfried Carl Vy Khoi Le
+	Multi-Valued Variational Equations	2021	Siegfried Carl Vy Khoi Le
+	Multi-Valued Parabolic Variational Inequalities on Convex Sets	2021	Siegfried Carl Vy Khoi Le
+	Multi-Valued Elliptic Variational Inequalities on Convex Sets	2021	Siegfried Carl Vy Khoi Le
+	Mathematical Preliminaries	2021	Siegfried Carl Vy Khoi Le
+	Multi-Valued Variational Inequalities with Convex Functionals	2020	Siegfried Carl Vy Khoi Le
+	Multi-Valued Variational Inequalities in Unbounded Domains	2020	Siegfried Carl Vy Khoi Le
+ PDF Chat	On systems of parabolic variational inequalities with multivalued terms	2020	Siegfried Carl Vy Khoi Le
+	Extremal solutions of multi-valued variational inequalities in plane exterior domains	2019	Siegfried Carl Vy Khoi Le
+	Invariance of critical points under Kelvin transform and multiple solutions in exterior domains of $$\mathbb {R}^2$$ R 2	2019	Siegfried Carl David G. Costa Morteza Fotouhi Hossein Tehrani
+	Extremal solutions of logistic-type equations in exterior domain in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml1" display="inline" overflow="scroll" altimg="si1.gif"><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:math>	2018	Siegfried Carl David G. Costa Hossein Tehrani
+	Decay estimates for Wolff potentials in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:msup></mml:math> and gradient-dependent quasilinear elliptic equations	2018	Siegfried Carl
+ PDF Chat	Extremal solutions for quasilinear parabolic systems in trapping regions	2018	Siegfried Carl Dumitru Motreanu
+ PDF Chat	Quasilinear elliptic equations with measures and multi-valued lower order terms	2017	Siegfried Carl Christoph Tietz
+	Extremal solutions of p-Laplacian problems in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mi>p</mml:mi></mml:mrow></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:msup><mml:mo stretchy="false">)</mml:mo></mml:math> via Wolff …	2017	Siegfried Carl
+	𝒟<sup>1,2</sup>(ℝ<sup> <i>N</i> </sup>) versus <i>C</i>(ℝ<sup> <i>N</i> </sup>) local minimizer on manifolds and multiple solutions for zero-mass equations in ℝ<sup> <i>N</i> </sup>	2017	Siegfried Carl David G. Costa Hossein Tehrani
+	<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi mathvariant="script">D</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:msup><mml:mo stretchy="false">)</mml:mo></mml:math> versus <mml:math xmlns:mml="http://www.w3.…	2016	Siegfried Carl David G. Costa Hossein Tehrani
+	Extremal solutions for nonvariational quasilinear elliptic systems via expanding trapping regions	2016	Siegfried Carl Dumitru Motreanu
+	Extremal and sign-changing solutions of supercritical logistic-type equations in $$\mathbb {R}^N$$ R N	2015	Siegfried Carl David G. Costa Hossein Tehrani
+	Barrier solutions of elliptic variational inequalities	2015	Siegfried Carl
+ PDF Chat	Nonlinear elliptic systems	2015	Siegfried Carl Dumitru Motreanu
+	Nonlinear elliptic systems	2015	Siegfried Carl Dumitru Motreanu
+	Elliptic inequalities with multi-valued operators: Existence, comparison and related variational–hemivariational type inequalities	2014	Siegfried Carl Vy Khoi Le
+ PDF Chat	Critical points in open sublevels and multiple solutions for parameter-depending quasilinear elliptic equations	2014	Pasquale Candito Siegfried Carl Roberto Livrea
+	Multiple solutions for elliptic systems via trapping regions and related nonsmooth potentials	2014	Siegfried Carl Dumitru Motreanu
+	Existence and extremal solutions of parabolic variational–hemivariational inequalities	2013	Siegfried Carl
+	Variational versus pseudomonotone operator approach in parameter-dependent nonlinear elliptic problems	2013	Pasquale Candito Siegfried Carl Roberto Livrea
+	Multiple solutions for quasilinear elliptic problems via critical points in open sublevels and truncation principles	2012	Pasquale Candito Siegfried Carl Roberto Livrea
+ PDF Chat	Addendum to: Variational approach to noncoercive systems of elliptic variational inequalities via trapping region	2012	Siegfried Carl
+ PDF Chat	Preface	2011	Siegfried Carl S. Marano Dumitru Motreanu
+	Variational approach to noncoercive systems of elliptic variational inequalities via trapping region†	2011	Siegfried Carl
+	Parameter-dependent variational–hemivariational inequalities and an unstable degenerate elliptic free boundary problem	2011	Siegfried Carl
+	Generalized solutions of singular p-Laplacian problems in $\mathbb{R}^N$	2011	Siegfried Carl Kanishka Perera
+	Fixed Point Theory in Ordered Sets and Applications: From Differential and Integral Equations to Game Theory	2010	Siegfried Carl Seppo Heikkilä
+	Fixed Point Theory in Ordered Sets and Applications	2010	Siegfried Carl Seppo Heikkilä
+	Banach-Valued Integral Equations	2010	Siegfried Carl Seppo Heikkilä
+	Banach-Valued Ordinary Differential Equations	2010	Siegfried Carl Seppo Heikkilä
+	Discontinuous Multi-Valued Elliptic Problems	2010	Siegfried Carl Seppo Heikkilä
+	Multiple and sign‐changing solutions for the multivalued <i>p</i> ‐Laplacian equation	2010	Siegfried Carl Dumitru Motreanu
+ PDF Chat	Sign-Changing Solutions for Nonlinear Elliptic Problems Depending on Parameters	2010	Siegfried Carl Dumitru Motreanu
+	Multiple solutions of quasilinear periodic-parabolic inclusions	2009	Siegfried Carl
+	Directedness of solution set for some quasilinear multi-valued parabolic problems	2009	Siegfried Carl Dumitru Motreanu
+	Fixed point theorems in ordered Banach spaces via quasilinearization	2009	V. Lakshmikantham Siegfried Carl Seppo Heikkilä
+ PDF Chat	General Comparison Principle for Variational-Hemivariational Inequalities	2009	Siegfried Carl Patrick Winkert
+ PDF Chat	Order properties of spaces of non-absolutely integrable vector-valued functions and applications to differential equations	2009	Siegfried Carl Seppo Heikkilä Guoju Ye
+	Existence and multiplicity for quasilinear elliptic inclusions with nonmonotone discontinuous multifunction	2008	Siegfried Carl Seppo Heikkilä
+	The sub- and supersolution method for variational–hemivariational inequalities	2008	Siegfried Carl
+	p-Laplacian Inclusions via Fixed Points for Multifunctions in Posets	2007	Siegfried Carl Seppo Heikkilä
+	Constant-sign and sign-changing solutions for nonlinear eigenvalue problems	2007	Siegfried Carl Dumitru Motreanu
+ PDF Chat	Constant-sign and sign-changing solutions of a nonlinear eigenvalue problem involving the $p$-Laplacian	2007	Siegfried Carl Dumitru Motreanu
+	Mathematical Preliminaries	2007	Siegfried Carl Vy Khoi Le Dumitru Motreanu
+	Quasilinear elliptic inclusions of Clarke's gradient type under local growth conditions	2006	Siegfried Carl Dumitru Motreanu
+	Vector Quasi-Hemivariational Inequalities and Discontinuous Elliptic Systems	2006	Siegfried Carl Z. Naniewicz
+	Existence and comparison results for noncoercive and nonmonotone multivalued elliptic problems	2005	Siegfried Carl
+	On the existence of minimal and maximal solutions of discontinuous functional Sturm-Liouville boundary value problems	2005	Siegfried Carl Seppo Heikkilä
+	Nonsmooth and nonlocal differential equations in lattice-ordered Banach spaces	2005	Siegfried Carl Seppo Heikkilä
+	Extremality in Solving General Quasilinear Parabolic Inclusions	2004	Siegfried Carl Dumitru Motreanu
+	Fixed point theorems for multifunctions with applications to discontinuous operator and differential equations	2004	Siegfried Carl Seppo Heikkilä
+	Existence and Comparison Results for Quasilinear Evolution Hemivariational Inequalities	2004	Siegfried Carl Vy Khoi Le Dumitru Motreanu
+	Monotone penalty approximation of extremal solutions for quasilinear noncoercive variational inequalities	2004	Siegfried Carl Vy Khoi Le
+	Sub-supersolution method for quasilinear parabolic variational inequalities	2004	Siegfried Carl Vy Khoi Le
+	Enclosure results for quasilinear systems of variational inequalities	2003	Siegfried Carl Vy Khoi Le
+	Fixed point theorems for multivalued operators and application to discontinuous quasilinear BVP's	2003	Siegfried Carl Seppo Heikkilä
+	Trapping regions for discontinuously coupled systems of evolution variational inequalities and application	2003	Siegfried Carl Seppo Heikkilä Joseph W. Jerome
+	Extremal solutions of quasilinear parabolic inclusions with generalized Clarke's gradient	2003	Siegfried Carl Dumitru Motreanu
+ PDF Chat	Extremal solutions of quasilinear parabolic subdifferential inclusions	2003	Siegfried Carl Dumitru Motreanu
+	TRAPPING REGIONS FOR DISCONTINUOUSLY COUPLED DYNAMIC SYSTEMS	2003	Siegfried Carl Joseph W. Jerome
+	Elliptic problems with lack of compactness via a new fixed point theorem	2002	Siegfried Carl Seppo Heikkilä
+ PDF Chat	Trapping region for discontinuous quasilinear elliptic systems of mixed monotone type	2002	Siegfried Carl Joseph W. Jerome
+	Generalized quasilinearization method for reaction–diffusion equations under nonlinear and nonlocal flux conditions	2002	Siegfried Carl V. Lakshmikantham
+	Existence of solutions for discontinuous functional equations and elliptic boundary-value problems	2002	Siegfried Carl Seppo Heikkilä
+	Generalized quasilinearization and semilinear parabolic problems	2002	Siegfried Carl V. Lakshmikantham
+ PDF Chat	Sign‐changing and multiple solutions for the <i>p</i>‐Laplacian	2002	Siegfried Carl Kanishka Perera
+	Existence of Extremal Solutions of Boundary Hemivariational Inequalities	2001	Siegfried Carl
+	Operator equations in ordered sets and discontinuous implicit parabolic equations	2001	Siegfried Carl Seppo Heikkilä
+	Discontinuous reaction-diffusion equations under discontinuous and nonlocal flux conditions	2000	Siegfried Carl Seppo Heikkilä
+	Extremality results for first-order discontinuous functional differential equations	2000	Siegfried Carl Seppo Heikkilä
+	On discontinuous implicit and explicit abstract impulsive boundary value problems	2000	Siegfried Carl Seppo Heikkilä
+	Nonlinear Differential Equations in Ordered Spaces	2000	Siegfried Carl Seppo Heikkilä
+	Extremal Solutions for Quasilinear Elliptic Inclusions in All of ℝN with State-Dependent Subdifferentials	2000	Siegfried Carl
+	Operator and Differential Equations in Ordered Spaces	1999	Siegfried Carl Seppo Heikkilä
+ PDF Chat	On discontinuous implicit differential equations in ordered Banach spaces with discontinuous implicit boundary conditions	1999	Siegfried Carl Seppo Heikkilä
+	On Discontinuous First Order Implicit Boundary Value Problems	1998	Siegfried Carl Seppo Heikkilä
+	On second order discontinuous implicit boundary value problems with discontinuous implicit boundary conditions	1998	Siegfried Carl Seppo Heikkilä
+	On Discontinuous Implicit Evolution Equations	1998	Siegfried Carl Seppo Heikkilä
+	Elliptic equations with discontinuous nonlinearities in N	1998	Siegfried Carl Seppo Heikkilä
+ PDF Chat	Discontinuous implicit elliptic boundary value problems	1998	Siegfried Carl Seppo Heikkilä
+ PDF Chat	A free boundary problem for quasilinear elliptic equations in exterior domains	1998	Siegfried Carl Seppo Heikkilä
+	Quasilinear elliptic equations with discontinuous nonlinearities in Rn	1997	Siegfried Carl
+ PDF Chat	Existence of extremal periodic solutions for quasilinear parabolic equations	1997	Siegfried Carl
+	An envelope theorem for weak solutions of quasilinear elliptic boundary value problems	1996	Siegfried Carl
+	The weak upper and lower solution method for quasilinear elliptic equations with generalized subdifferentiable perturbations	1995	Siegfried Carl H. Dietrich
+	On the existence of extremal solutions for discontinuous elliptic equations under discontinuous flux conditions	1994	Siegfried Carl Seppo Heikkilä
+	Boundary value problems with discontinuities and monotone discretization	1994	Siegfried Carl Christian Großmann
+ PDF Chat	On the existence of extremal weak solutions for a class of quasilinear parabolic problems	1993	Siegfried Carl
+	On a generalized iteration method with applications to fixed point theorems and elliptic systems involving discontinuities	1993	Siegfried Carl Seppo Heikkilä M. Kumpulainen
+	A combined variational–monotone iterative method for elliptic boundary value problems with discontinuous nonlinearity	1992	Siegfried Carl
+ PDF Chat	On extremal solutions of an elliptic boundary value problem involving discontinuous nonlinearities	1992	Siegfried Carl Seppo Heikkilä
+	Monotone enclosure for elliptic and parabolic sytems with nonmonotone nonlinearities	1990	Siegfried Carl Christian Großmann
+	An Enclosing Theorem and a Monotone Iterative Scheme for Elliptic Systems Having Nonmonotone Nonlinearities	1990	Siegfried Carl
+	On a parabolic boundary value problem with discontinuous nonlinearity	1990	Siegfried Carl Seppo Heikkilä
+	ITERATIVE SPLINE BOUNDS FOR SYSTEMS OF BOUNDARY VALUE PROBLEMS	1989	Siegfried Carl Christian Großmann
+	The monotone iterative technique for a parabolic boundary value problem with discontinuous nonlinearity	1989	Siegfried Carl
+	A Comparison Result for Nonlinear Elliptic Systems Having Nonmonotone Nonlinearities	1989	Siegfried Carl
+	A monotone iterative scheme for nonlinear reaction-diffusion systems having nonmonotone reaction terms	1988	Siegfried Carl
+	A maximum principle for a class of generalized analytic functions	1988	Siegfried Carl
+	Ein konstruktiver Existenzsatz für Randwertprobleme elliptischer Differentialgleichungen zweiter Ordnung mit unstetiger Nichtlinearität	1988	Siegfried Carl
+ PDF Chat	Lösung semilinearer parabolischer Rand- AnIangswertprobleme durch monotone Iteration im Sobolevraum $W_2^{1,1} (Q_T)$	1986	Siegfried Carl
+	Zur Effektivität des Verfahrens der monotonen Iteration bei semilinearen parabolischen und elliptischen Randwertproblemen	1986	Siegfried Carl

Common Coauthors

Coauthor	Papers Together
Seppo Heikkilä	33
Dumitru Motreanu	17
Vy Khoi Le	16
Hossein Tehrani	8
Patrick Winkert	5
David G. Costa	5
Joseph W. Jerome	3
V. Lakshmikantham	3
Roberto Livrea	3
Pasquale Candito	3
Christian Großmann	3
Kanishka Perera	2
Franziska Borer	2
H. Dietrich	1
M. Kumpulainen	1
Morteza Fotouhi	1
Guoju Ye	1
S. Marano	1
Christoph Tietz	1
Z. Naniewicz	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	Nonlinear Functional Analysis and its Applications	1990	Eberhard Zeidler	33
+	Optimization and Nonsmooth Analysis	1990	Frank H. Clarke	31
+	Nonlinear Differential Equations in Ordered Spaces	2000	Siegfried Carl Seppo Heikkilä	30
+	Monotone Iterative Techniques for Discontinuous Nonlinear Differential Equations	2017	Seppo Heikkilä V. Lakshmikantham	19
+ PDF Chat	Elliptic Partial Differential Equations of Second Order	2001	David Gilbarg Neil S. Trudinger	18
+	Boundary regularity for solutions of degenerate elliptic equations	1988	Gary M. Lieberman	16
+	Monotone Iterative Techniques for Discontinuous Nonlinear Differential Equations	2017	Seppo Heikkilä V. Lakshmikantham	16
+	A Strong Maximum Principle for some quasilinear elliptic equations	1984	Juan-Luis V�zquez	14
+ PDF Chat	3.—A Criterion for the Existence of Solutions of Non-linear Elliptic Boundary Value Problems	1976	Johanna Deuel Peter Heß	13
+	Constant-sign and sign-changing solutions for nonlinear eigenvalue problems	2007	Siegfried Carl Dumitru Motreanu	12
+ PDF Chat	Partial Differential Equations	1988	Shiing-Shen Chern	11
+	Nonlinear Functional Analysis and Its Applications: II/ A: Linear Monotone Operators	1989	Eberhard Zeidler	11
+	C1 + α local regularity of weak solutions of degenerate elliptic equations	1983	Emmanuele DiBenedetto	11
+	Nonlinear Potential Theory of Degenerate Elliptic Equations	2018	Juha Heinonen Tero Kilpeläinen Олли Мартио	11
+ PDF Chat	Sign‐changing and multiple solutions for the <i>p</i>‐Laplacian	2002	Siegfried Carl Kanishka Perera	10
+	Extremal solutions of quasilinear parabolic inclusions with generalized Clarke's gradient	2003	Siegfried Carl Dumitru Motreanu	8
+	Fixed Point Theory in Ordered Sets and Applications	2010	Siegfried Carl Seppo Heikkilä	8
+	The Beginning of the Fučik Spectrum for the p-Laplacian	1999	Mabel Cuesta D. De Figueiredo Jean–Pierre Gossez	7
+	Nonlinear Functional Analysis and its Applications: III: Variational Methods and Optimization	1984	Eberhard Zeidler	7
+	Quelques méthodes de résolution des problèmes aux limites non linéaires	1969	Jacques Louis Lions	7
+	<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi mathvariant="script">D</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:msup><mml:mo stretchy="false">)</mml:mo></mml:math> versus <mml:math xmlns:mml="http://www.w3.…	2016	Siegfried Carl David G. Costa Hossein Tehrani	7
+	On harnack type inequalities and their application to quasilinear elliptic equations	1967	Neil S. Trudinger	7
+	Extremal and sign-changing solutions of supercritical logistic-type equations in $$\mathbb {R}^N$$ R N	2015	Siegfried Carl David G. Costa Hossein Tehrani	7
+	Nonlinear Functional Analysis and Its Applications	1990	Eberhard Zeidler	6
+	Subsolution–supersolution method in variational inequalities	2001	Vy Khoi Le	6
+	Nonlinear Functional Analysis and its Applications	1985	Eberhard Zeidler	6
+	Nonlinear parabolic boundary value problems with upper and lower solutions	1978	Johanna Deuel Peter Heß	6
+	On sign-changing and multiple solutions of the p-Laplacian	2003	Zhitao Zhang Shujie Li	6
+	The weak supersolution-subsolution method for second order quasilinear elliptic equations	1989	Takeshi Kura	6
+	Quasilinear Elliptic Equations with Degenerations and Singularities	1997	Pavel Drábek Alois Kufner Francesco Nicolosi	6
+ PDF Chat	A range and existence theorem for pseudomonotone perturbations of maximal monotone operators	2010	Vy Khoi Le	6
+	On an elliptic boundary value problem with discontinuous nonlinearity	1990	Seppo Heikkilä	6
+	Nonsmooth Critical Point Theory and Nonlinear Boundary Value Problems	2004	Leszek Gasiński Νικόλαος Παπαγεωργίου	6
+ PDF Chat	On the existence of a maximal weak solution for a semilinear elliptic equation	1989	E. N. Dancer Guido Sweers	6
+	Maximal and minimal solutions of elliptic differential equations with discontinuous non-linearities	1978	C. A. Stuart	6
+	Variational Inequalities with General Multivalued Lower Order Terms Given by Integrals	2011	Vy Khoi	6
+	Nonsmooth Critical Point Theory and Nonlinear Boundary Value Problems	2004	Leszek Gasiński Nikolaos S. Papageorgiou	6
+	Monotone iterative techniques for nonlinear differential equations	1985	G. S. Ladde V. Lakshmikantham A. S. Vatsala	6
+	Monotonicity methods for nonlinear evolution equations	1996	Juha Berkovits Vesa Mustonen	6
+	SOBOLEV VERSUS HÖLDER LOCAL MINIMIZERS AND GLOBAL MULTIPLICITY FOR SOME QUASILINEAR ELLIPTIC EQUATIONS	2000	J.P. Garcı́a Azorero Ireneo Peral Juan J. Manfredi	6
+ PDF Chat	On the existence of extremal weak solutions for a class of quasilinear parabolic problems	1993	Siegfried Carl	6
+ PDF Chat	The Wiener test and potential estimates for quasilinear elliptic equations	1994	Tero Kilpeläinen Jan Malý	6
+ PDF Chat	Elliptic Partial Differential Equations of Second Order	1977	David Gilbarg Neil S. Trudinger	6
+	Elliptic Differential Equations and Obstacle Problems	1987	Giovanni Maria Troianiello	6
+	Boundary Value Problems for Systems of Implicit Differential Equations	1993	Marlène Frigon Tomasz Kaczyński	5
+	Nonlinear elliptic boundary-value problems in unbounded domains	1992	C. V. Pao	5
+	Extremal solutions of p-Laplacian problems in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mi>p</mml:mi></mml:mrow></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:msup><mml:mo stretchy="false">)</mml:mo></mml:math> via Wolff …	2017	Siegfried Carl	5
+	Decay estimates for Wolff potentials in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">R</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:msup></mml:math> and gradient-dependent quasilinear elliptic equations	2018	Siegfried Carl	5
+	Monotone enclosure for elliptic and parabolic sytems with nonmonotone nonlinearities	1990	Siegfried Carl Christian Großmann	5
+	Free boundary problems and the set-valued mappings	1983	Kung-Ching Chang	5