Ejikeme, C. L., E. Abeh, M. B. Okofu, T. Ge, D. C. Ugo, and B. C. Agbata. “Dynamical Analysis of a Diphtheria Transmission Model With Epidemiological Data Fitting”. GPH-International Journal of Applied Science, Vol. 6, no. 5, May 2023, pp. 20-42, doi:10.5281/zenodo.20284331.