A. Mutar, M. and 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), pp. 110 - 138. Available at: https://journalsc.qu.edu.iq/index.php/JOPS/article/view/841 (Accessed: 2December2025).