Mohammed, K.M. and Al-Dulaimi, D.A. (2017) “Synthesis and Characterization of Heterocyclic Seven Membered Rings from 2,3-Pyridine caroboxylic anhydride”, Ibn AL-Haitham Journal For Pure and Applied Sciences, 29(2), pp. 421–436. Available at: https://jih.uobaghdad.edu.iq/index.php/j/article/view/139 (Accessed: 4 April 2025).