(1)
Steyn, H. M.; Von Staden, L.; Bellstedt, D. U.; van Der Merwe, P. D.; van Wyk, A. E.

Notes on the Phytogeography and Conservation Status of the Genus Acanthopsis (Acantheae, Acanthaceae)

. Phytotaxa 2019, 415, 157–178.