Volume 57, Issue 130, July 2011, Pages 1-15
EMAN M.A. EL-NASER; NEVEN A. EL-NISR; AZHAR M. HASSAN; G.F. KHAMIS; A.A. AAMER; NAWAL M.A. YOSIF
Volume 55, Issue 123, October 2009, Pages 1-19
AZHAR M. HASSAN; NEVEN A. EL-NISR; EMAN M.A. EL-NASER