%0 Journal Article %A I. V. Gaishun %T Discrete equations with variable structure and the stability of their solutions %J Differencialʹnye uravneniâ %D 1997 %P 1607-1614 %V 33 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1997_33_12_a3/ %G ru %F DE_1997_33_12_a3