Duru*†, E. ., M. . Anyanwu†, and C. . Nwosu†. “Optimal Vaccination and Treatment Strategies for Control of Rubella With Vertical Transmission”. International Journal of Mathematical Analysis and Modelling, vol. 6, no. 2, Oct. 2023, https://tnsmb.org/journal/index.php/ijmam/article/view/95.