%0 Journal Article %A L. É. Reiziņš %A L. A. Bieza %T A criterion for the uniqueness of the trajectory that enters a stationary point in a prescribed direction %J Differencialʹnye uravneniâ %D 1972 %P 2205-2210 %V 8 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_12_a11/ %G ru %F DE_1972_8_12_a11