%0 Journal Article
%A I. V. Kamenev
%T Oscillation critieria for a linear second order equation that are connected with the existence of a ``principal'' solution
%J Differencialʹnye uravneniâ
%D 1973
%P 370-373
%V 9
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_2_a23/
%G ru
%F DE_1973_9_2_a23