%0 Journal Article
%A V. A. Yakubovich
%T On a class of non-linear differential equations
%J Doklady Akademii Nauk
%D 1957
%P 44-46
%V 117
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_117_1_a9/
%G ru
%F DAN_1957_117_1_a9