A. Mutar, M., & F. Jawad, S. (2018). Synthesis And characterization Of New Type Of Biodegradable Polyurethane Containing Azo Derivatives Of Benzocaine. Al-Qadisiyah Journal of Pure Science, 20(3), 110 - 138. Retrieved from https://journalsc.qu.edu.iq/index.php/JOPS/article/view/841