%0 Journal Article
%A V. N. Chevelo
%A V. G. Shtelik
%T Some problems in the oscillation of solutions of nonlinear, non-autonomous second-order equations
%J Doklady Akademii Nauk
%D 1963
%P 276-279
%V 149
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_149_2_a14/
%G ru
%F DAN_1963_149_2_a14