@article{VMUMM_2016_5_a4,
     author = {V. V. Aleksandrov and O. V. Aleksandrova and I. S. Konovalenko and K. V. Tikhonova},
     title = {Perturbed stable systems on a {plane.~I}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {30--36},
     publisher = {mathdoc},
     number = {5},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2016_5_a4/}
}