@article{DE_1988_24_12_a23,
     author = {S. G. Kondratenya and I. N. Klimashevskaya and T. I. Shilo},
     title = {Existence and construction of polar solutions of an autonomous system of two differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2170--2172},
     publisher = {mathdoc},
     volume = {24},
     number = {12},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_12_a23/}
}