@article{DE_1982_18_10_a20,
     author = {L. I. Burkina and G. A. Leonov},
     title = {The limit cycles of the second kind in dynamical systems with cylindrical phase space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1819},
     publisher = {mathdoc},
     volume = {18},
     number = {10},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_10_a20/}
}