@article{DE_1966_2_11_a6,
     author = {M. V. Dolov},
     title = {Algebraic limit cycles of a differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1469--1473},
     publisher = {mathdoc},
     volume = {2},
     number = {11},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_11_a6/}
}