@article{DE_1996_32_1_a2,
     author = {S. I. Dovnar and L. A. Cherkas},
     title = {The curve of separatrix cycles of an autonomous quadratic system in the plane. {The} case of two anti-saddles},
     journal = {Differencialʹnye uravneni\^a},
     pages = {15--21},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_1_a2/}
}