Caputo-Fabrizio Fractional Order Derivative Mathematical Modeling and Optimal Control, Cost-Effectiveness Analysis of Diphtheria Transmission Dynamics in Nigeria. International Journal of Latest Technology in Engineering Management & Applied Science, [S. l.], v. 14, n. 12, p. 580–616, 2026. DOI: 10.51583/IJLTEMAS.2025.1412000054. Disponível em: https://www.ijltemas.in/submission/online/article/view/3761.. Acesso em: 13 mar. 2026.