NUMERICAL SOLUTIONS OF COVID-19 SIRD MODEL IN NIGERIA. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 6, n. 4, p. 60–67, 2022. DOI: 10.33003/fjs-2022-0604-989. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/989. Acesso em: 12 sep. 2025.