Chitra, V., and D. Roopsingh. “Synthesis and Characterization of Certain Photoactive Liquid Crystalline Poly(ester Amides) from 2,5-Pyridine Dicarboxylic Acid”. Asian Journal of Chemistry 31, no. 5 (March 28, 2019): 997–1001. Accessed May 17, 2024. https://asianpubs.org/index.php/ajchem/article/view/31_5_5.