%0 Journal Article %A M. V. Faminskaya %T A singularly perturbed, weakly nonlinear problem with associated vectors that correspond to a zero characteristic number %J Differencialʹnye uravneniâ %D 1981 %P 1411-1425 %V 17 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_8_a5/ %G ru %F DE_1981_17_8_a5