Mirazo Michelena, Javier E.; Page, Patrick Collin; Rubio-Martinez, Luis M.; Marais, Hendrik Johannes; Lyle, Catriona H.(AOSIS OpenJournals Publishing, 2014-11)
Myburgh, Jan G.; Kirberger, Robert M.; Steyl, Johan Christian Abraham; Soley, John Thomson; Booyse, Dirk J.; Huchzermeyer, Fritz W.; Lowers, Russell H.; Guillette, Louis J.(OpenJournals Publishing, 2014-05-05)