A Multiplicity Result for a Non-Autonomous Sublinear Elliptic Problem Involving Nonlinearities Indefinite in Sign. Minimax Theory and its Applications, [S. l.], v. 4, n. 1, p. 21–32, 2019. Disponível em: https://journalmta.com/index.php/jmta/article/view/52. Acesso em: 9 jun. 2026.