Cauchy Problem for Semilinear Wave Equations in Four Space Dimensions with Small Initial Data. Journal of Partial Differential Equations, [S. l.], v. 8, n. 2, p. 135–144, 1995. Disponível em: https://gsp.tricubic.dev/jpde/article/view/3790. Acesso em: 15 mar. 2026.