Gocke, Klaus, William Bussing, and Jorge Cortés. “The Annual Cycle of Primary Productivity in Laguna De Río Cuarto, a Volcanic Lake (maar) in Costa Rica”. Revista de Biología Tropical 38, no. 2B (November 1, 1990): 387–394. Accessed November 25, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/25432.