ALI, E. T..
 Synthesis Of New Asymmetrical Pyromellitdiimides  Derived From Pyromellitic Dianhydride.
<strong>Ibn AL- Haitham Journal For Pure and Applied Science</strong>, [S.l.], v. 25, n. 3, p. 284-293, may 2017.
ISSN 2521-3407.
Available at: &lt;<a href="http://jih.uobaghdad.edu.iq/index.php/j/article/view/595" target="_new">http://jih.uobaghdad.edu.iq/index.php/j/article/view/595</a>&gt;. Date accessed: 21 nov. 2019.