Volume 43, Issue 4, September 2012, Pages 45-63
H.A. Shoman; M.A. Abd El-Gawad; faathy motagally; Ragab Ahmed El-Sayed Dawood
Volume 42, Issue 2, June 2011, Pages 94-106
Howida E. Ahmed; Ragab Ahmed El-Sayed Dawood; Anaam H. Gala; Kamel Ali Abdel-Rahamn