Essex County College Newark, U.S.A - May 22, 2001
University of Maryland, Eastern Shore U.S.A - May 25, 2001
Savannah State University U.S.A - June 6, 2001
University of Glasgow, Scotland - June 2001
Kwame Nkrumah University of Science & Technology - December 15 2001
University of Ghana Legon, Ghana - March 12, 2004
Igbinedeon University, Okada, Nigeria - November 25, 2007