Volume 57, Issue 130, July 2011, Pages 1-28
M.A. EL-SEIFY; O.M. MAHRAN; A.M.I. ABD EL AAL
Volume 56, Issue 125, April 2010, Pages 1-18
O.M. MAHRAN; G.A. TAHER
Volume 55, Issue 121, April 2009, Pages 1-15
O.M. MAHRAN
Volume 55, Issue 120, January 2009, Pages 1-23
O.M. MAHRAN
Volume 54, Issue 117, April 2008, Pages 290-301
G.A. TAHER; O.M. MAHRAN
Volume 53, Issue 112, January 2007, Pages 1-14
M.A. SALEH; O.M. MAHRAN
Volume 52, Issue 111, October 2006, Pages 149-162
O.M. MAHRAN