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)