TY - JOUR AU - Yu. N. Bibikov TI - An application of a theorem of Moser to the investigation of differential equations of nonlinear oscillations JO - Doklady Akademii Nauk PY - 1975 SP - 1241 EP - 1244 VL - 225 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1975_225_6_a0/ LA - ru ID - DAN_1975_225_6_a0 ER -