TY - JOUR AU - V. M. Volosov TI - Solutions of some perturbed systems in the neighbourhood of periodical motions JO - Doklady Akademii Nauk PY - 1958 SP - 587 EP - 590 VL - 123 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1958_123_4_a1/ LA - ru ID - DAN_1958_123_4_a1 ER -