A NONLINEAR MODEL OF POLLUTION. INTERNATIONAL JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (IJAST), [S. l.], v. 1, n. 1, p. 9–12, 2013. Disponível em: https://lib-index.com/index.php/IJAST/article/view/IJAST_01_01_002.. Acesso em: 31 jul. 2025.