@article{DE_1999_35_12_a0,
     author = {A. N. Deryugin and A. Yu. Loskutov},
     title = {On the generation of limit cycles from a separatrix contour in a three-parameter family of dynamical systems on orientable two-dimensional manifolds},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1587--1596},
     publisher = {mathdoc},
     volume = {35},
     number = {12},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_12_a0/}
}