Volume 29, Issue 3, September 2004, Pages 13-23
Elsayed A. M. Elshafei; Emad Abd El-Latief El-Negiry
Volume 28, Issue 2, June 2003, Pages 57-70
E. A. M. Elshafei; Emad Abd El-Latief El-Neigiry El-Neigiry