%0 Journal Article
%A A. Yu. Levin
%T Classification of no-oscillation cases for equation $\ddot{x}+p(t)\dot{x}+q(t)x=0$ where $q (t)$ is of constant sign
%J Doklady Akademii Nauk
%D 1966
%P 1037-1040
%V 171
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_171_5_a6/
%G ru
%F DAN_1966_171_5_a6