TY - JOUR AU - N. N. Ladis TI - Topological equivalence of certain differential systems JO - Differencialʹnye uravneniâ PY - 1972 SP - 1116 EP - 1119 VL - 8 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_6_a21/ LA - ru ID - DE_1972_8_6_a21 ER -