Sánchez-González, Joaquín, and Alexander Rodríguez. “Una Especie Nueva De Tachia (Gentianaceae) De Isla Del Coco, Costa Rica”. Journal of the Botanical Research Institute of Texas 11, no. 2 (November 29, 2017): 327–333. Accessed May 3, 2024. https://journals.brit.org/jbrit/article/view/1072.