Van Heerden, Cornelius Hendrik, 1957-; Kotze, Theuns G.; Bruwer, Johan(Southern African Alliance for Sport Science, Physical Education and Recreation, 2004)
Wiese, Melanie; Van Heerden, Cornelius Hendrik, 1957-; Van Heerden, Neels, 1957-; Jordaan, Yolanda(University of Johannesburg, Department of Business Management, 2010)
Van Heerden, Cornelius Hendrik, 1957-; Van Heerden, Neels, 1957-; Du Plessis, P.J.(Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2004-03)