1997 IUCN red list of threatened plants (1997)

The botanic gardens list of rare and threatened species (1984)

Botanical Exploration of Southern Africa : :An illustrated history of early botanical literature on the Cape Flora, Biographical accounts of the leading plant collectors and their activities in southern Africa form the days of the East India Company until the modern times - Glen, H.F. (SANBI, 2010)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

A revision of the genus <Arbelodes Karsch> (Lepidoptera: Cossoidea: Metarbelidae) from southeast-central and southern Africa with the description of 13 new species - Lehmann, Ingo (Ingo Lehmann, 2010)

A revision of the genus <Arbelodes Karsch> (Lepidoptera: Cossoidea: Metarbelidae) from southeast-central and southern Africa with the description of 13 new species - Lehmann, Ingo (Ingo Lehmann, 2010)

South African journal of science - South African Association for the Advancement of Science. (South African Association for the Advancement of Science, 1921)