Volume 19, Issue A-2, December 2008, Pages 213-224
NAHED F. ABD EL-GHAFFAR; NADIA T. DAWOOD; FATMA H. ABD EL-SALAM; AWTIF E. FARRAG
Volume 17, Issue 1-A, June 2006, Pages 161-170
NAHED ABD EL-GHAFFAR; NADIA DAWOOD; BAHYIA EL.SADEK