López-Garro, Andrés, and Ilena Zanella. “Residency of Bull Sharks, Carcharhinus Leucas (Carcharhiniformes: Carcharhinidae), at San Pedrillo Islet in Islas Murciélago, North Pacific of Costa Rica”. Revista de Biología Tropical 69, no. S2 (October 1, 2021): S246–S255. Accessed November 23, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/48321.