Pretorius, Etheresia; Steyn, Helena C.; Engelbrecht, Mia; Swanepoel, A.C. (Albe Carina); Oberholzer, Hester Magdalena(Lippincott Williams and Wilkins, 2011-12)
Pretorius, Etheresia; Olivier, Jeane; Oberholzer, Hester Magdalena; Van der Spuy, Wendy Jeannette(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2011-07)
Pretorius, Etheresia; Windberger, Ursula B.; Oberholzer, Hester Magdalena; Auer, Roland E.J.(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2010-11)