@article{VSPUI_2011_4_a2,
     author = {A. M. Kamachkin},
     title = {On construction of the piecewise-smooth orbit neighborhood},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {32--39},
     year = {2011},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2011_4_a2/}
}