Schoeman, N.J. (Nicolaas Johannes); Robinson, Z. Clausen; De Wet, Theuns J.; Robinson, Zurika(Faculty of Economic and Management Sciences, University of Pretoria, 2000-06)
Van Heerden, J.H. (Jan Horn), 1957-; Schoeman, N.J. (Nicolaas Johannes)(Bureau for Economic Research and the Graduate School of Business, University of Stellenbosch, 2000)