Kristof Van Assche,Monica Gruezmacher,Lochner (University of the Free State Marais South Africa),Xaquin Perez Sindin
（2）
Sharp, Carla,Marais, Lochner (University of the Free State, South Africa)
（2）
Burger, Philippe (University of the Free State, South Africa),Marais, Lochner (University of the Free State, South Africa),van Rooyen, Deirdre
（1）
Lochner (University of the Free State Marais South Africa)
（1）
Marais, Lochner (University of the Free State, South Africa),Nel, Etienne (University of Otago, New Zealand),Donaldson, Ronnie (Stellenbosch University, South Africa)
（1）
；Matebesi, Sethulego (University of the Free State, South Africa),Marais, Lochner (University of the Free State, South Africa),Nel, Verna
（1）
