Geodesic
Limit cycles of a quadratic system of differential equations in the presence of an integral line
Differencialʹnye uravneniâ, Tome 25 (1989) no. 2, pp. 351-352 
R. M. Mints. Limit cycles of a quadratic system of differential equations in the presence of an integral line. Differencialʹnye uravneniâ, Tome 25 (1989) no. 2, pp. 351-352. http://geodesic.mathdoc.fr/item/DE_1989_25_2_a34/
@article{DE_1989_25_2_a34,
     author = {R. M. Mints},
     title = {Limit cycles of a quadratic system of differential equations in the presence of an integral line},
     journal = {Differencialʹnye uravneni\^a},
     pages = {351--352},
     year = {1989},
     volume = {25},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_2_a34/}
}
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