Abidemi, A., Fatmawati, and O. J. Peter. “Deterministic Double Dose Vaccination Model of COVID-19 Transmission Dynamics - Optimal Control Strategies With Cost-Effectiveness Analysis”. Communication in Biomathematical Sciences, vol. 7, no. 1, June 2024, pp. 1-33, doi:10.5614/cbms.2024.7.1.1.