A.-K. MOHAMME, Abdul-Halim; M. KASSIM, Dhia El-Din; M. HASSAN, Huda. Quality Improvement of Spent Lubricating Oil. Iraqi Journal of Chemical and Petroleum Engineering, Baghdad, Iraq., v. 8, n. 3, p. 31–35, 2007. DOI: 10.31699/IJCPE.2007.3.6. Disponível em: https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/485.. Acesso em: 23 dec. 2024.