Volume 44, Issue 4, December 2019, Pages 1-6
Seleem Saleh ELSayed; Ghada Mohamed Abd Elhady Gamiaa
Volume 25, Issue 3, September 2000, Pages 14-27
A. A. Fattah; E. Mokhtar
Volume 18, Issue 2, June 1993, Pages 1-13
Ahmed Abd El-Fattah Abd El-Rahman