Bytebier, Benny. “New and Noteworthy Records to the Angolan Orchid Flora Revealed by the Little-Known Watercolours of Helen Faulkner (1888–1979)”. Phytotaxa 710, no. 1 (July 11, 2025): 79–90. Accessed December 6, 2025. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.710.1.4.