Volume 55, Issue 122, July 2009, Pages 1-12
G.F. KHAMIS; M.R. ABD ELLAH; NEVEEN A. ELNISR; M. ABD ELMOETY; A.M. MANAA; A.A. AAMER; M.M. ABDUL-HAFEEZ
Volume 54, Issue 119, October 2008, Pages 1-20
H.A. SHALABY; S.A. TAWFIK; R.A. EL-RAMADY; S.S.S. YONIS