Denyer, Percy. 1998. “Historic-Prehistoric Earthquakes, Seismic Hazards, and Tertiary and Quaternary Geology of the Gandoca-Manzanillo National Wildlife Refuge, Limón, Costa Rica”. Revista De Biología Tropical 46 (S6):237–250. https://revistas.ucr.ac.cr/index.php/rbt/article/view/29831.