“Using Vacuum Distillation Technique to Treat Waste Lubricating Oil and Evaluation its Efficiency by Chromatographic Methods”, ANJS, vol. 20, no. 2, pp. 17–24, Jun. 2017, Accessed: Apr. 06, 2025. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/73