Verloove, Filip, Joachim Thiede, Águedo Marrero Rodríguez, Marcos Salas-Pascual, Jorge Reyes-Betancort, Elizabeth Ojeda-Land, and Gideon Smith. “A Synopsis of Feral Agave and Furcraea (Agavaceae, Asparagaceae S. Lat.) in the Canary Islands (Spain)”. Plant Ecology and Evolution 152, no. 3 (November 28, 2019): 470-498. Accessed September 30, 2020. https://www.plecevo.eu/index.php/plecevo/article/view/1429.