Figueiredo E, Smith GF.

Friedrich Welwitsch and his overlooked contributions to the Flora of Tropical Africa, with a discussion of the names of Kalanchoe (Crassulaceae subfam. Kalanchooideae) that should be ascribed to Welwitsch alone

. Phytotaxa [Internet]. 2020 Aug. 28 [cited 2025 Jun. 20];458(1):83–100. Available from: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.458.1.5