1. Ammar , Y. A. El-Sharief , A. M. Sh. Zahran , M. A. El-Said , M. Z. El-Said , U. H. J. Chem. Resh. (S) 1995 324
2. El-Dean A. M. Kamal Geies , A. A. J. Chem. Resh. (S), (S) 1997 352
3. J. Chem. Resh. (S), (M) 1997 2255
4. Hussein , A. M. El-Emary , T. I. J. Chem. Resh. (S), (S) 1998 320
5. J. Chem. Resh. (S), ( M ) 1998 231