Volume 52, Issue 1, March 2021, Pages 20-30
G. A. Abd El-Hafez; Hussein A.M. A.; M. N. M. Abd El-Ati; Asmaa M. Abdelkarim
Volume 41, Issue 4, December 2010, Pages 63-74
G. Abd El-Hafez; Abd El-Nasser A. Mohammed; Hamid M. S. Ziyadah
Volume 41, Issue 2, May 2010, Pages 24-40
G. A. Abd El-Hafez; Soliman M. Mousa; Ibrahim A. Soliman; Mohamed A. Awadallah; Hany G. Galal