Lopes, M. M., Pedro, F. S., Santos, J. P. C. dos, Ibá´ñez, D. S., Esmi, E., & Barros, L. C. de. (2022). Fractional derivatives as weighted average of historical values: an application to COVID-19 in Brazil. C.Q.D. - Revista Eletrônica Paulista De Matemática, 22(2), 275–284. https://doi.org/10.21167/cqdv22n22022275284