%0 Journal Article
%A Ya. Sh. Il'yasov
%T On periodic non-trivial solutions of the equation $-\Delta u=g(u)$ in~$\mathbb R^{N+1}$
%J Izvestiya. Mathematics 
%D 1995
%P 101-119
%V 59
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1995_59_1_a3/
%G en
%F IM2_1995_59_1_a3