Volume 27, Issue 1, January 2013, Pages 21-31
M.R.K Ashry; K.M.R. Youssef; S.M.M. Abdou; A.A. El- Masry
Volume 27, Issue 1, January 2013, Pages 70-83
E.A.M. Osman; A.A. Khalil; A.A. El- Masry