1. Rana N.; Nagham M.A.; Majid J.; Synthesis, identification of heterocyclic compounds and study of biological activity. Asian J Res Chem 2014,7(7),664-676
2. Clayden G.; Warren and Wothers, Organic Chemistry 2001
3. Theophil E.; Siegfried, Hanpt, M The Chemistry of Hetero cycles 2003
4. Joule J.A.; Mills K.; Hetero Cyclic Chemistry 2010
5. Louis D.Q.; John A.T.; Fundamentals of Hetero Cyclic Chemistry 2010