Ramírez, A., P. Paaby, C. M. Pringle, and G. Agüero. “Effect of Habitat Type on Benthic Macro Invertebrates in Two Lowland Tropical Streams, Costa Rica”. Revista De Biología Tropical, vol. 46, no. S6, Dec. 1998, pp. 201–213, https://revistas.ucr.ac.cr/index.php/rbt/article/view/29826.