%0 Journal Article %A S. M. Labovski %T A condition for the nonvanishing of the Wronskian of a fundamental system of solutions of a linear differential equation with retarded argument %J Differencialʹnye uravneniâ %D 1974 %P 426-430 %V 10 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1974_10_3_a3/ %G ru %F DE_1974_10_3_a3