%0 Journal Article
%A E. S. Chichkin
%T A~non-oscillation theorem for a~linear self-adjoint differential equation of fourth order
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1960
%P 206-209
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1960_4_a22/
%G ru
%F IVM_1960_4_a22