Moyo, Robin Mkhokheli; Van Niekerk, Willem A.; Hassen, Abubeker; Du Toit, Cornelius Jacobus Lindeque; Adejoro, Festus Adeyemi(Escola Superior de Agricultura, 2022)
Svinurai, Walter; Hassen, Abubeker; Tesfamariam, Eyob Habte; Ramoelo, Abel(NISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group), 2021)