%0 Journal Article %A V. I. Gromak %A V. V. Tsegel'nik %T Solutions of a system of three differential equations with quadratic nonlinearities %J Differencialʹnye uravneniâ %D 1991 %P 396-402 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1991_27_3_a3/ %G ru %F DE_1991_27_3_a3