“Synthesis and Characterization of Some New Heterocyclic Compounds (Thiazolidine, Tetrazole And Azetidinone) from Schiff Bases Contain 1,4-Dihydropyridine” (2026) College of Basic Education Research Journal, 22(1), pp. 188–208. doi:10.33899/berj.2026.Vol22.Iss1.61913.