YUNUSA ALIYU HADEJIA; MUJAHID ABDULL AHI; KABIR BELLO; USMAN NURAINI ABDULLAHI. Sustainable multi-product production planning in closed-loop supply chains: managing production defects, stochastic demand, returns, and carbon emission policies. Dutse Journal of Pure and Applied Sciences, [S. l.], v. 12, n. 3a, p. 193–215, 2026. Disponível em: https://www.ajol.info/index.php/dujopas/article/view/333419. Acesso em: 9 oct. 2026.