%0 Journal Article %A N. F. Trubitsyn %T A test of stability of linear systems with variable coefficients %J Differencialʹnye uravneniâ %D 1968 %P 1994-2001 %V 4 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_11_a7/ %G ru %F DE_1968_4_11_a7