Horak, Ivan Gerard; Nyangiwe, Nkululeko; De Matos, Carlos Antonio; Das Neves, Luis Carlos Bernardo G.(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2009-02)
De Matos, Carlos Antonio; Sitoe, C.; Das Neves, Luis Carlos Bernardo G.; Bryson, N.R.; Horak, Ivan Gerard(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-06)