%0 Journal Article %A L. M. Kuks %A A. A. Svirchevsky %T Theorems in the qualitative theory of partial difference equations %J Differencialʹnye uravneniâ %D 1968 %P 375-378 %V 4 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_2_a20/ %G ru %F DE_1968_4_2_a20