@article{VMUMM_2015_6_a8,
     author = {T. V. Salova},
     title = {The efficiency of perturbations in the class of linear {Hamiltonian} systems},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {48--52},
     publisher = {mathdoc},
     number = {6},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2015_6_a8/}
}