Basic bilateral very well-poised series and Shukla's <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mmultiscripts><mml:mi>ψ</mml:mi><mml:mn>8</mml:mn><mml:none /><mml:mprescripts /><mml:mn>8</mml:mn><mml:none /></mml:mmultiscripts></mml:math>-summation formula