%0 Journal Article %A V. A. Pliss %T Boundedness of solutions of certain non-linear third-order differential equations %J Doklady Akademii Nauk %D 1961 %P 302-304 %V 139 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_139_2_a10/ %G ru %F DAN_1961_139_2_a10