Abdul Kareem, Rawnaq Qahtan, and Khalid W. Salih Al-Janabi. “Determination of the Degree of Consumption (DoC) of Lube Engine Oils Using Fluorescence Spectroscopy”. Ibn AL-Haitham Journal For Pure and Applied Sciences 31, no. 1 (May 17, 2018): 124–144. Accessed March 29, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1860.