%0 Journal Article
%A P. Winternitz
%A A. Yu. Orlov
%T $P_\infty$ algebra of KP, free fermions and 2-cocycle in the Lie algebra of pseudodifferential operators
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1997
%P 231-260
%V 113
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1997_113_2_a1/
%G ru
%F TMF_1997_113_2_a1