TY - JOUR AU - Yu. A. Pykh TI - On stability of a class of systems of nonlinear differential equations JO - Doklady Akademii Nauk PY - 1972 SP - 766 EP - 768 VL - 203 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1972_203_4_a9/ LA - ru ID - DAN_1972_203_4_a9 ER -