%0 Journal Article
%A P. I. Plotnikov
%T Existence of a~countable set of periodic solutions of the problem of forced oscillations for a~weakly nonlinear wave equation
%J Sbornik. Mathematics
%D 1989
%P 543-556
%V 64
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1989_64_2_a16/
%G en
%F SM_1989_64_2_a16