Liouville Type Theorems of Semilinear Equations with Square Sum of Vector Fields. Journal of Partial Differential Equations, [S. l.], v. 18, n. 2, p. 149–153, 2005. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/4040. Acesso em: 5 dec. 2025.