Volume 34, Issue 1, January 2017, Pages 541-566
W. F. EL Metwally; T. A. El-Sakhawy
Volume 33, Issue 1, January 2016, Pages 43-62
A. M. Okasha; W. F. EL Metwally; T.M. Attaffey
Volume 29, Issue 1, January 2012, Pages 81-100
M. E. El-Iraqi; W. F. EL Metwally