Hussein ST, Ali ET, Ali KF, Tomma JH. Evidence Supports The Formation Of Isoimides Derived From Pyromellitic Dianhydride. IHJPAS [Internet]. 2017 Apr. 30 [cited 2025 Aug. 15];26(1):241-9. Available from: https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/530