BRENNER, P. On $L_p$-decay and scattering for nonlinear Klein-Gordon equations. MATHEMATICA SCANDINAVICA, [S. l.], v. 51, p. 333–360, 1982. DOI: 10.7146/math.scand.a-11985. Disponível em: https://www.mscand.dk/article/view/11985. Acesso em: 6 may. 2024.