%0 Journal Article %A K. B. Mansimov %T Optimization of a class of discrete two-parameter systems %J Differencialʹnye uravneniâ %D 1991 %P 359-362 %V 27 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1991_27_2_a23/ %G ru %F DE_1991_27_2_a23