Integrated Taxonomic Information System (ITIS): Glaucidium capense (TSN )itis.gov. Viitattu 10.6.2012. (englanniksi)
iucnredlist.org
BirdLife International: Glaucidium capenseIUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 19.5.2014. (englanniksi)