El-Sharief, A. M. Sh.; Mekky, A. K. T.; Yousef, A. A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 3, p. 245 - 247
El-Sharief, A. M. Sh.; Mekky, A. K. T.; Yousef, A. A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 3, p. 245 - 247