%0 Journal Article
%A M. K. Bugir
%T Conditions for the oscillation of equations of the form $L^ku+c(x,u)=f(x)$
%J Doklady Akademii Nauk
%D 1989
%P 538-541
%V 304
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1989_304_3_a4/
%G ru
%F DAN_1989_304_3_a4