Existence of solutions for nonlocal semilinear fractional integro-differential equation with Krasnoselskii-Krein-type conditions. Nonlinear Studies, [S. l.], v. 19, n. 3, 2012. Disponível em: https://www.nonlinearstudies.com/index.php/nonlinear/article/view/471. Acesso em: 4 oct. 2025.