A. UGWA, Kalu; A., Agwu. Mathematical Modeling as A Tool for Sustainable Development in Nigeria. International Journal of Academic Research in Progressive Education and Development, [S. l.], v. 1, n. 2, 2012. Disponível em: https://ijarped.com/index.php/journal/article/view/41. Acesso em: 3 aug. 2025.