Gweryina, Reuben Iortyer, Chinwendu Emilian Madubueze, and Martins Afam Nwaokolo. 2021. “Mathematical Modelling and Control of COVID-19 Transmission in the Presence of Exposed Immigrants”. Communication in Biomathematical Sciences 4 (2):93-105. https://doi.org/10.5614/cbms.2021.4.2.2.