Horak, Ivan Gerard; Nyangiwe, Nkululeko; De Matos, Carlos Antonio; Neves, L.C.B.G.D. (Luís)(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2009-02)
Nyangiwe, Nkululeko; Goni, Sindisile; Herve-Claude, Louis P.; Ruddat, Inga; Horak, Ivan Gerard(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2011-10-07)