%0 Journal Article
%A V. P. Arkhipov
%A A. V. Sobolev
%T Oscillation properties of degenerate second-order differential
%J Doklady Akademii Nauk
%D 1984
%P 777-779
%V 275
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1984_275_4_a0/
%G ru
%F DAN_1984_275_4_a0