Lizano, Omar G., Eric J. Alfaro, and Alfonso Salazar Matarrita. “A Method to Evaluate Metal Enrichment in Marine Sediments”. Revista de Biología Tropical 60, no. S2 (April 1, 2012): 197–211. Accessed August 20, 2025. https://archivo.revistas.ucr.ac.cr/index.php/rbt/article/view/20005.