Shridhar, D. R.; Jogibhukta, M.; Rao, P. Shanthan; Handa, Vijay K.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1983 , vol. 22, # 12 p. 1187 - 1190
El-Barbary, A. A.; Hammouda, H. A.; El-Borai, M.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1984 , vol. 23, # 8 p. 770 - 773