Fasina, Folorunso Oludayo; Mokoele, Japhta Molatelo; Spencer, Brian Tom; Van Leengoed, Leo A.M.G.; Bevis, Yvette; Booysen, Ingrid(AOSIS Open Journals, 2015-11-27)
Snyman, Jumari; Koekemoer, Otto; Van Schalkwyk, Antoinette; Van Vuren, Petrus Jansen; Snyman, Louwtjie P.; Williams, June Heather; Venter, Marietjie(MDPI, 2021-03)