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)
Van Heerden, Neels, 1957-; Van Heerden, Cornelius Hendrik, 1957-; Schreuder, A.N.; Gouverneur, M.(Faculty of Economic and Management Sciences, University of Pretoria, 2000-03)
Wiese, Melanie; Van Heerden, Cornelius Hendrik, 1957-; Van Heerden, Neels, 1957-; Jordaan, Yolanda(University of Johannesburg, Department of Business Management, 2010)