%0 Journal Article %A I. A. Rudakov %T Periodic solutions of a non-linear wave equation with homogeneous boundary conditions %J Izvestiya. Mathematics %D 2006 %P 109-120 %V 70 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2006_70_1_a4/ %G en %F IM2_2006_70_1_a4