%0 Journal Article %A P. B. Golokvoschyus %T The structure and periodicity of the solutions of a certain two-dimensional system of differential equations %J Differencialʹnye uravneniâ %D 1975 %P 1922-1934 %V 11 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_11_a1/ %G ru %F DE_1975_11_11_a1