Ali, E. T., , K. M. Lazim AL-Aliawy, and J. H. Tomma. “Synthesis and Characterization of New Symmetrical Pyromellitdiimide Derivatives and Their Amic Acids”. Ibn AL-Haitham Journal For Pure and Applied Sciences 24, no. 3 (December 29, 2016). Accessed April 3, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/833.