%0 Journal Article %A I. V. Gaishun %A V. Q. Hoang %T Conditions for complete controllability and observability of discrete two-parameter systems %J Differencialʹnye uravneniâ %D 1991 %P 187-193 %V 27 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1991_27_2_a0/ %G ru %F DE_1991_27_2_a0