Volume 60, Issue 142, July 2014, Pages 64-68
EL-SANGARY, F.H.; NOUR, E.M.; AMAL I.A. EL-SHORBAGY; EL-HADY, K.M.; AZZA G.M. AYOUB
Volume 59, Issue 138, July 2013, Pages 74-78
ABDL-KHALIK A.; AZZA G.M. AYOUB; MONA TALAAT RASLAN