%0 Journal Article
%A Ya. Sh. Ilyasov
%T Existence of periodic nonnegative solutions of the equations $-\!\Delta u=g(u)$ in $\mathbb{R}^{N+1}$
%J Doklady Akademii Nauk
%D 1993
%P 149-151
%V 332
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1993_332_2_a5/
%G ru
%F DAN_1993_332_2_a5