Wood, Paola Silvia; Kruger, P.E. (Pieter Ernst); Loots, J.M.; Grimbeek, J. (Jackie)(Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2007-12)
Debusho, Legesse Kassa(South African Society of Crop Production/ Soil Science Society of South Africa/ Southern African Weed Science Society/ Southern African Society for Horticultural Sciences, 2008)
Naude, H.E.; Sykes, R.; Du Preez, Renata; Pretorius, H.W. (Herman Walter); Van der Linde, Michael J. (Mike); Pauw, J.(Health and Medical Publishing Group, 2009-12)