TY - JOUR AU - S. V. Кirgetоva TI - Some questions of the theory of perturbations of Hamiltonian systems with Hamiltonian in the form of a trigonometric polynomial JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1991 SP - 62 EP - 68 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1991_1_a12/ LA - ru ID - VMUMM_1991_1_a12 ER -