A Caputo-Based Fractional Order Modelling of COVID-19 in Nigeria. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 7, n. 5, p. 1575–1610, 2025. DOI: 10.12150/jnma.2025.1575. Disponível em: https://www.global-sci.com/index.php/jnma/article/view/23058. Acesso em: 5 dec. 2025.