Mirazo Michelena, Javier E.; Page, Patrick Collin; Rubio-Martinez, Luis M.; Marais, Hendrik Johannes; Lyle, Catriona H.(AOSIS OpenJournals Publishing, 2014-11)
Cloete, M.; Dungu, B.; Van Staden, L.I.; Ismail-Cassim, N.; Vosloo, Wilna(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-03)