See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/290433368 51-58 (6) QPJZ-0157-20151 12-9-15 Revised (1) Dataset · January 2016 READS 23 6 authors, including: Hanan Abdel Fattah El-Sadawy National Research Center, Egypt 18 PUBLICATIONS 22 CITATIONS SEE PROFILE Hussien A. Abouelhag 10 PUBLICATIONS 14 CITATIONS SEE PROFILE Ashraf Mohamed Ahmed King Saud University 33 PUBLICATIONS 396 CITATIONS SEE PROFILE Tahany Ayaad King Saud University 17 PUBLICATIONS 28 CITATIONS SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately. Available from: Hanan Abdel Fattah El-Sadawy Retrieved on: 21 April 2016