Volume 11, ASAT Conference, 17-19 May 2005, May 2011, Pages 691-701
El-barbary K. A.; EL-Mandy A. E.; EL shawadfy S. A.
Volume 12, ASAT Conference, 29-31 May 2007, May 2007, Pages 1-15
EL-Mahdy A. E.; EL shawadfy S. A.