Perturbation Effects for a Singular Elliptic Problem with Lack of Compactness and Critical Exponent. Minimax Theory and its Applications, [S. l.], v. 2, n. 1, p. 79–97, 2017. Disponível em: https://journalmta.com/index.php/jmta/article/view/26. Acesso em: 13 aug. 2026.