- ↑ Broadley, D.G. (1995) The snouted cobra, Naja annulifera, a valid species in southern Africa., J. Herpetol. Ass. Africa 44: 26-32.
- ↑ Mertens, R. (1937) Reptilien und Amphibien aus dem südlichen Inner-Afrika., Abh. senckenberg. naturf. Ges. 435: 1-23
- ↑ Boulenger, G.A. (1896) Catalogue of the snakes in the British Museum, Vol. 3., London (Taylor & Francis), xiv + 727 pp.
- ↑ Boettger,O. (1887) Zweiter Beitrag zur Herpetologie Südwest- und Südafrikas., Ber. senckenb. naturf. Ges., Frankfurt am Main, 1887:135-173
- ↑ Bocage,J.V.B. du (1879) Reptiles et batraciens nouveaux d'Angola., J. Acad. Sci. Lisbon 7: 97-99
- ↑ 6.0 6.1 Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ TIGR Reptile Database . Uetz P. , 2 Oktubre 2007