Reddy, P. S. N.; Reddy, P. Pratap
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 890 - 891
Poddubnyi, I. S.; Belen'skii, L. I.; Krayushkin, M. M.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1994 , vol. 30, # 5 p. 602 - 607
Khimiya Geterotsiklicheskikh Soedinenii, 1994 , # 5 p. 686 - 692
Khan, Mahmud Tareq Hassan; Choudhary, Muhammad Iqbal; Khan, Khalid Mohammed; Rani, Mubeen; Atta-ur-Rahman
Bioorganic and Medicinal Chemistry, 2005 , vol. 13, # 10 p. 3385 - 3395