Herman, Paul, and Marinda Koekemoer. “Two New Species of Callilepis (Asteraceae) from Southern Africa With Corymbose Inflorescences”. Phytotaxa 183, no. 4 (October 24, 2014): 254–262. Accessed December 6, 2025. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.183.4.4.