MANJU, K. A.; MOMOH, A. A. . .; CHUKKOL, Y. B. .; ISIYAKU, M. . Mathematical Modeling and Optimal Control of Intervention Strategies for Covid-19 Disease. International Journal of Science for Global Sustainability, [S. l.], v. 9, n. 2, p. 168–187, 2023. DOI: 10.57233/ijsgs.v9i2.469. Disponível em: https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/469. Acesso em: 21 aug. 2026.