Al-Shurafat, Alaa, and Raid Banat. “Properties of Oil Shale Ash Filled Polypropylene Composite Material: Mechanical and Physical Characterization”. Asian Journal of Chemistry 33, no. 9 (August 20, 2021): 2175–2181. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/33_9_30.