Hishmat, O. H.; Rahman, A. H. Abd El; Diwani, H. I. El; Bakr, Sh. M. Abu
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 566 - 568

Diwani, Hoda I. El.; Abu-Bakr, Sherifa M.; Hishmat, Orchidee H.; Arbid, Mahmoud S.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1993 , vol. 32, # 4 p. 494 - 496