KHAN, I. H.; MAHMOOD, F.; ZAHRA, S.; SALEEM, F.; NAEEM, M. STUDIES ON THE UTILIZATION OF SPENT CATALYST USED IN OIL REFINERY. Biological Sciences - PJSIR, [S. l.], v. 47, n. 4, p. 265–267, 2004. Disponível em: https://v2.pjsir.org/index.php/biological-sciences/article/view/1532. Acesso em: 3 jul. 2024.