Volume 55, Issue 120, January 2009, Pages 1-16
S.A. TAWFIK; R.A. EL-RAMADY; H.A. SHALABY; S.S.S. YONIS
Volume 54, Issue 119, October 2008, Pages 1-20
H.A. SHALABY; S.A. TAWFIK; R.A. EL-RAMADY; S.S.S. YONIS