@article{DE_1973_9_12_a0,
     author = {Yu. N. Bibikov},
     title = {A certain critical case in the theory of stability of motion},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2123--2135},
     publisher = {mathdoc},
     volume = {9},
     number = {12},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_12_a0/}
}