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://global-sci.com/index.php/jpde/article/view/3790. Acesso em: 5 dec. 2025.