Umaña V., Gerardo. “Limnology of Botos Lake, a Tropical Crater Lake in Costa Rica”. Revista de Biología Tropical 49, no. S2 (December 1, 2001): 1–10. Accessed May 10, 2025. https://www.revistas.ucr.ac.cr/index.php/rbt/article/view/26288.