Kerhali, Okba, and Bassam Sultan. “Bitumen Modification Using Used Motor Oils to Reduce Short-and Long-Term Aging”. Tishreen University Journal -Engineering Sciences Series 45, no. 4 (September 7, 2023): 159–171. Accessed May 17, 2024. https://journal.tishreen.edu.sy/index.php/engscnc/article/view/15079.