TY - JOUR AU - V. G. Egorov TI - The stability of the solutions of periodical systems of total differential equations JO - Doklady Akademii Nauk PY - 1957 SP - 11 EP - 13 VL - 114 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1957_114_1_a1/ LA - ru ID - DAN_1957_114_1_a1 ER -