A Ky Fan Minimax Inequality Approach to Implicit Obstacle Problems of Fractional Laplacian Type Involving a Generalized Gradient Operator. Minimax Theory and its Applications, [S. l.], v. 9, n. 2, p. 185–200, 2024. Disponível em: https://journalmta.com/index.php/jmta/article/view/125. Acesso em: 29 jun. 2026.