Volume 43.1, Issue 85, April 2000, Pages 239-250
Sanaa A.H. El-Shamy; Shahera M.R. Abdel Haseeb; Azhar M. Abdel Aziz
Volume 40.1, Issue 79, October 1998, Pages 61-72
R.S. Ibrahim; Ashgan M. Sayed; Azhar M. Abdel Aziz; A.M. Sayed