ALI, E. T.; AL-ALIAWY, , K. M. Lazim; TOMMA, J. H. Synthesis and Characterization of New Symmetrical Pyromellitdiimide Derivatives and Their Amic Acids. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 24, n. 3, 2016. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/833. Acesso em: 3 apr. 2025.