Campos-Rocha, Antonio, et al. “Griffinia Angustifolia (Amaryllidaceae), a New Endangered Species Endemic to the Brazilian Caatinga Biome”. CienciAmérica, vol. 6, no. 1, Apr. 2017, pp. 51-56, https://www.cienciamerica.edu.ec/index.php/uti/article/view/72.