%0 Journal Article
%A S. Ts. Akopyan
%A V. N. Zharkov
%A V. M. Lyubimov
%T Perturbation theory for radial oscillations of the Earth. Second approximation
%J Doklady Akademii Nauk
%D 1973
%P 584-587
%V 210
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_210_3_a17/
%G ru
%F DAN_1973_210_3_a17