Ali, E.T., AL-Aliawy, , .K.M.L. and Tomma, J.H. (2016) “Synthesis and Characterization of New Symmetrical Pyromellitdiimide Derivatives and Their Amic Acids”, Ibn AL-Haitham Journal For Pure and Applied Sciences, 24(3). Available at: https://jih.uobaghdad.edu.iq/index.php/j/article/view/833 (Accessed: 3 April 2025).