Czeczuga, B., L.I. Ferraro, and M. Baron. “Carotenoids in Some Lichen Species From South Brazil and Paraguay”. Boletim de Botânica da Universidade de São Paulo 13 (June 25, 1992): 23–29. Accessed May 19, 2024. https://www.journals.usp.br/bolbot/article/view/57775.