Volume 59, Issue 139, October 2013, Pages 80-85
AYA G. SAAD EL-DEEN
Volume 59, Issue 138, July 2013, Pages 138-145
AYA GALAL SAAD EL-DEEN
Volume 57, Issue 131, October 2011, Pages 1-10
A. A. ELKAMEL; AYA G. SAAD EL-DEEN; S.M. AFIFI