TY - JOUR AU - V. A. Pliss TI - An investigation of a non-linear system of three differential equations JO - Doklady Akademii Nauk PY - 1957 SP - 184 EP - 187 VL - 117 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1957_117_2_a5/ LA - ru ID - DAN_1957_117_2_a5 ER -