Volume 30, APRIL- JUNE, June 2009, Pages 309-318
Elkhatib H.A.
Volume 30, APRIL- JUNE, June 2009, Pages 319-332
Volume 30, JANUARY- MARCH, March 2009, Pages 136-145
Elkhatib H.A.; S.M. Gabr; F.I. Radwan; R.F. Abo El-Ali