%0 Journal Article %A E. E. Demidov %T Schur pairs, non-commutative deformation of the Kadomtsev--Petviashvili hierarchy and skew differential operators %J Fundamentalʹnaâ i prikladnaâ matematika %D 2001 %P 683-698 %V 7 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_2001_7_3_a4/ %G ru %F FPM_2001_7_3_a4