Overdetermined Boundary Value Problems in $\mathbb{S}^n$. Journal of Mathematical Study, [S. l.], v. 50, n. 2, p. 165–173, 2017. DOI: 10.4208/jms.v50n2.17.03. Disponível em: https://global-sci.com/index.php/jms/article/view/13297. Acesso em: 6 dec. 2025.