%0 Journal Article %A A. V. Gulin %T Stability of difference schemes and operator inequalities %J Differencialʹnye uravneniâ %D 1979 %P 2238-2250 %V 15 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_12_a15/ %G ru %F DE_1979_15_12_a15