@article{DE_1969_5_6_a5,
     author = {V. M. Lebedeva},
     title = {The number of periodic solutions of a first order differential equation with right-hand side in the form of an incomplete polynomial},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1029--1036},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_6_a5/}
}