%0 Journal Article %A V. N. Gorbatenko %T An investigation of the stability of the solutions in a certain nonlinear fourth order system %J Differencialʹnye uravneniâ %D 1972 %P 913-916 %V 8 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_5_a21/ %G ru %F DE_1972_8_5_a21