@article{DE_2001_37_3_a8,
     author = {L. A. Cherkas and A. A. Grin'},
     title = {Algebraic {Aspects} of {Finding} a {Dulac} {Function} for {Polynomial} {Autonomous} {Systems} on the {Plane}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {384--390},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_3_a8/}
}