Volume 45, Issue 5, December 2014, Pages 18-27
Volume 39, Issue 4, December 2008, Pages 17-35
A. Abdel - Gawad,; B. Ramadan; Mohamed B. Omar; Refat E.A. Oraby
Volume 38, Issue 3, December 2007, Pages 37-48
Mohamed A. H. Sorour; Hany A. Fahmy; Bolbol R. Ramadan.