Volume 50, Issue 100, January 2004, Pages 74-83
Nahed M.M. Wahba; M.M. Ali; Eman K. Ahmed
Volume 49, Issue 99, October 2003, Pages 70-80
Eman K. Ahmed; M.A. Abdel-Sater
Volume 46.2, Issue 92, January 2002, Pages 116-124
Sohair Z. Hussein; Eman K. Ahmed