TY - JOUR AU - T. V. Salova TI - The efficiency of perturbations in the class of linear Hamiltonian systems JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2015 SP - 48 EP - 52 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2015_6_a8/ LA - ru ID - VMUMM_2015_6_a8 ER -