ALMALAHI, M. A.; PANCHAL, S. K. Existence results of ψ-Hilfer integro-differential equations with fractional order in Banach space. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 19, p. 171–192, 2020. Disponível em: https://studmath.uken.krakow.pl/article/view/7932. Acesso em: 2 dec. 2024.