Saswati Phookan. “Synthesis and Characterization of Polyamideimides from Diaminobenzophenone-3,3′ ,4,4′ -Tetracarboxylic Diimides and Aromatic Dicarboxylic acid— Terephthalic Acid (TPA)”. International Journal of Emerging Trends in Science and Technology, Vol. 3, no. 06, June 2016, pp. 4171-5, http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1125.