Volume 31, Issue 1, January 2014, Pages 133-154
M.S. El-Shal; A.S. El-Ashry; A.M. El-Shal; W.B. Fakhrany
Volume 26, Issue 3, July 2009, Pages 1466-1477
A.S. El-Ashry; H.A. El-Gendy; M.H. Abo El-Naga