@article{MMO_1956_5_a10,
     author = {V. V. Nemytskii},
     title = {On certain methods of qualitative investigation ``in~the large'' of many-dimensional autonomous systems},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {455--482},
     publisher = {mathdoc},
     volume = {5},
     year = {1956},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1956_5_a10/}
}