“Synthesis and Characterization of Some New Heterocyclic Compounds (Thiazolidine, Tetrazole And Azetidinone) from Schiff Bases Contain 1,4-Dihydropyridine”. College of Basic Education Research Journal 22, no. 1 (March 1, 2026): 188–208. Accessed September 23, 2026. https://berj.uomosul.edu.iq/index.php/berj/article/view/61913.