GARBA, S. M. .; GUMEL, A. B.; HUSSAINI, N. . Mathematical Analysis Of An Age-Structured Vaccination Model For Measles. Journal of the Nigerian Mathematical Society, [S. l.], v. 33, n. 1-3, p. 41–76, 2021. Disponível em: https://ojs.ictp.it/jnms/index.php/jnms/article/view/708. Acesso em: 26 apr. 2024.