@article{DE_1995_31_5_a2,
     author = {M. V. Dolov and E. V. Kruglov},
     title = {On limit cycles for a class of dynamical systems with a cylindrical phase space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {752--758},
     publisher = {mathdoc},
     volume = {31},
     number = {5},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_5_a2/}
}