Smith, Gideon F. “The ‘woody clade’ in Kalanchoe: Reinstatement and Amendment of K. Subg. Calophygia (Crassulaceae Subfam. Kalanchooideae) Published by Bernard Marie Descoings in 2006”. Phytotaxa 616, no. 2 (September 26, 2023): 113–127. Accessed April 9, 2025. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.616.2.1.