HORANI, M. A.; FAVINI, A. Degenerate differential problems with fractional derivatives . Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 11, n. 2, p. 47–68, 2020. DOI: 10.6092/issn.2240-2829/12300. Disponível em: https://mathematicalanalysis.unibo.it/article/view/12300. Acesso em: 5 may. 2024.