TOMMA, Jumbad H.; AL-ALIAWI, Kadhim M. Lazim; ALI, Imad T. Synthesis of New Asymmetrical Pyromellitdiimide and Their Amic Acids Containing Heterocyclic Unit. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 27, n. 1, p. 234–246, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/382. Acesso em: 26 mar. 2025.