%0 Journal Article %A A. D. Lyashko %A E. M. Fedotov %T On the correctness of nonlinear two-layer operator-difference schemes %J Differencialʹnye uravneniâ %D 1981 %P 1304-1316 %V 17 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_7_a15/ %G ru %F DE_1981_17_7_a15