Volume 60, Issue 141, April 2014, Pages 105-111
ATTIA, E.R.H.; DOHRIEG, R.M.A.; EL-SHAFEI, M.A.
Volume 36.1, Issue 71, October 1996, Pages 167-172
E.R.H. ATTIA; I. G.A. IBRAHIM; M.S. TAWFIK