@article{DE_1972_8_12_a11,
     author = {L. \'E. Reizi\c{n}\v{s} and L. A. Bieza},
     title = {A criterion for the uniqueness of the trajectory that enters a stationary point in a prescribed direction},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2205--2210},
     publisher = {mathdoc},
     volume = {8},
     number = {12},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_12_a11/}
}