El-Sharief, A. M. Sh.; Zaher, M. R.; Hammad, N. I., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 9, p. 751 - 754
El-Sharief, A. M. Sh.; Zaher, M. R.; Hammad, N. I., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 9, p. 751 - 754