@article{DE_2006_42_8_a4,
     author = {A. B. Antonevich and Dang Khanh Hoi},
     title = {On the set of periods of periodic solutions of a model quasilinear differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1041--1051},
     publisher = {mathdoc},
     volume = {42},
     number = {8},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_8_a4/}
}