TY - JOUR AU - I. A. Kuzin TI - Existence of a countable set of periodic, spherically symmetric solutions of a~nonlinear wave equation JO - Izvestiya. Mathematics PY - 1992 SP - 107 EP - 129 VL - 38 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1992_38_1_a4/ LA - en ID - IM2_1992_38_1_a4 ER -