Modeling and Analysis of a Fractional Visceral Leishmaniosis with Caputo and Caputo–Fabrizio derivatives. J. Nig. Soc. Phys. Sci. [Internet]. 2023 Jul. 26 [cited 2024 Nov. 24];5(3):1453. Available from: https://journal.nsps.org.ng/index.php/jnsps/article/view/1453