Volume 35, Issue 1, January and February 2020, Pages 37-46
Volume 34, issue,12, November and December 2019, Pages 256-267
Taha, M.G. A.E. Khattab ; H.E. Ali M.A.M. Dawood
Volume 34, Issue 9, September and October 2019, Pages 194-213
Volume 34, Issue 5, May 2019, Pages 89-110
Volume 34, Issue 5, May 2019, Pages 111-126