CALAHORRANO, M.; CEVALLOS, I. Existence of radial solutions for indefinite semilinear elliptic equations. Selecciones Matemáticas, [S. l.], v. 7, n. 01, p. 42-51, 2020. DOI: 10.17268/sel.mat.2020.01.05. Disponível em: https://revistas.unitru.edu.pe/index.php/SSMM/article/view/2956. Acesso em: 26 apr. 2024.