Abdulaa Adnan, Maiada. “Synthesis of Polyurethane Based on (Resol Novolac Resin- Polyethylene Glycol) Copolymer and Their Analytical Study”. Journal of Kufa-Physics 11, no. 1 (July 26, 2019): 133–147. Accessed May 18, 2024. https://journal.uokufa.edu.iq/index.php/jkp/article/view/7218.