salih alzbaidy, saad, and Ammar Al-Khazraji. “The Use of Lignin in the Rheological Modification of Dura Asphalt”. Journal of Education and Science 29, no. 4 (December 1, 2020): 22–41. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42539.