@article{DE_1988_24_5_a27,
     author = {N. V. Uspenskaya},
     title = {Bifurcation of quasiperiodic solutions for a nonanalytic system of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {910--912},
     year = {1988},
     volume = {24},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_5_a27/}
}