Scharf, Uwe, and Michael Burkart. “Sansevieria pfennigii (Ruscaceae, Asparagales): Confirmation of Existence, Emendation of Description, and Tentative Threat Assessment”. Phytotaxa 483, no. 1 (February 5, 2021): 1–8. Accessed December 6, 2025. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.483.1.1.