Professeur émérite à l’Université de Pretoria
From 24 Oct 2007 To 24 Oct 2007
From 19 Nov 2007 To 19 Nov 2007
From 26 Nov 2007 To 26 Nov 2007
From 11 Feb 2008 To 11 Feb 2008
From 12 Apr 2008 To 12 Apr 2008