Esler, Karen J. (Karen Joan); Downsborough, L.; Roux, D.J.; Blignaut, James Nelson; Milton, Sue J. (Suzanne Jane), 1952-; Le Maitre, D.C. (David Carlyle); De Wit, M.P. (Martinus Petrus)(Elsevier, 2016-04)
Van Heerden, J.H. (Jan Horn), 1957-; Blignaut, James Nelson; Groenendijk, N.S.(Faculty of Economic and Management Sciences, University of Pretoria, 1999-06)