%0 Journal Article %A V. A. Korobitsyn %T Transformations of two-layer difference operators %J Differencialʹnye uravneniâ %D 1984 %P 533-536 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1984_20_3_a23/ %G ru %F DE_1984_20_3_a23