TY - JOUR AU - P.-A. Vuillermot TI - Nonexistence of spatially localized free vibrations for a class of nonlinear wave equations. JO - Commentarii mathematici Helvetici PY - 1987 SP - 573 EP - 586 VL - 62 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1987__62_140099/ ID - CMH_1987__62_140099 ER -