TY - JOUR AU - V. V. Nemytskii TI - On certain methods of qualitative investigation “in the large” of many-dimensional autonomous systems JO - Trudy Moskovskogo matematičeskogo obŝestva PY - 1956 SP - 455 EP - 482 VL - 5 UR - http://geodesic.mathdoc.fr/item/MMO_1956_5_a10/ LA - ru ID - MMO_1956_5_a10 ER -