Pollito, Percy Amilcar Zevallos, and Mário Tomazello Filho. “Cinchona Amazonica Standl. (Rubiaceae) in the State of Acre, Brazil”. Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais 1, no. 1 (April 15, 2006): 9–18. Accessed October 14, 2025. https://boletimcn.museu-goeldi.br/bcnaturais/article/view/752.