@article{DE_2002_38_3_a3,
     author = {S. I. Dovnar and L. A. Cherkas},
     title = {Curves of {Separatrix} {Cycles} of a {Quadratic} {System.} {The} {Case} of {Three} {Antisaddles} and {One} {Saddle}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {313--318},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2002_38_3_a3/}
}