Existence of Solution for Fractional Differential Problem with a Parameter. Communications in Mathematical Research, [S. l.], v. 30, n. 2, p. 157–167, 2021. DOI: 10.13447/j.1674-5647.2014.02.06. Disponível em: https://www.global-sci.com/index.php/cmr/article/view/8806. Acesso em: 5 dec. 2025.