^Goldblatt, Peter; John Manning (2008). The Iris Family: Natural History & Classification. Portland: Timber Press.
ISBN978-0-88192-897-6.
^Peter Goldblatt. 1989. Revision of the tropical African genus Zygotritonia (Iridaceae) . Bulletin du Muséum national d'histoire naturelle. Section B, Adansonia (Bull. Mus. natl. hist. nat., Sect. B, Adansonia) vol. 11, no2, pp. 199-212
ISSN0240-8937.
^Manning, John; Goldblatt, Peter (2008). The Iris Family: Natural History & Classification. Portland, Oregon: Timber Press. pp. 120–123.
ISBN978-0-88192-897-6.