Volume 27, Issue 3, July 2010, Pages 962-980
M.A.M. Ahmed; M.A. Awad; M.T. Afify; H.E. Osman
Volume 26, Issue 4, October 2009, Pages 1682-1695
S. I. El-Katib; S. F. M. Eid; H.E. Osman