Freitas, L., and A.A.S. Paoli. “Structure and Ultrastructure of the Extrafloral Nectaries of Croton Urucurana Baill. (Euphorbiaceae)”. Boletim de Botânica da Universidade de São Paulo 18 (June 27, 1999): 1–10. Accessed May 18, 2024. https://www.journals.usp.br/bolbot/article/view/58002.