Volume 41, Issue 3, September 2010, Pages 30-42
A. M. El-Salhy; H. M.M. Marzouk; A. Mohamed
Volume 40, Issue 2, December 2009, Pages 92-107
A. M. El-Salhy; K. A. Amen; alaa masoud; Eman A.A. Abou-Zaid