Kroeze, J.H. (Jan Hendrik); Matthee, Machdel C.; Bothma, T.J.D. (Theodorus Jan Daniel)(Department of Knowledge and Information Management, University of Johannesburg, 2004-12)
Lotriet, H.H. (Hugo H.); Matthee, Machdel C.; Mazanderani, Fadhila(Department of Knowledge and Information Management, University of Johannesburg, 2009-03)