Compartmental Model for Substance Abuse Dynamics: Threshold, Stability Analysis and Numerical Simulations. International Journal of Development Mathematics (IJDM), [S. l.], v. 3, n. 3, p. 173–200, 2026. DOI: 10.62054/ijdm/0303.09. Disponível em: https://ijdm.org.ng/index.php/Journals/article/view/391.. Acesso em: 9 sep. 2026.