@article{VMUMM_2017_1_a8,
     author = {V. V. Aleksandrov and T. B. Alexandrova and I. S. Konovalenko and K. V. Tikhonova},
     title = {Perturbed stable systems on a {plane.~II}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {53--57},
     publisher = {mathdoc},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2017_1_a8/}
}