%0 Journal Article %A L. M. Vaserman %A A. Ya. Lepin %T Generalized Bernšteǐn conditions for nonlinear systems of ordinary differential equations %J Differencialʹnye uravneniâ %D 1969 %P 1107-1113 %V 5 %N 6 %U http://geodesic.mathdoc.fr/item/DE_1969_5_6_a13/ %G ru %F DE_1969_5_6_a13