@article{DE_1975_11_11_a1,
     author = {P. B. Golokvoschyus},
     title = {The structure and periodicity of the solutions of a certain two-dimensional system of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1922--1934},
     publisher = {mathdoc},
     volume = {11},
     number = {11},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_11_a1/}
}