A. Mutar, Mohammed, and Sabrean F. Jawad. “Synthesis And Characterization Of New Type Of Biodegradable Polyurethane Containing Azo Derivatives Of Benzocaine”. Al-Qadisiyah Journal of Pure Science 20, no. 3 (July 31, 2018): 110 - 138. Accessed December 2, 2025. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/841.