Vaca Pita., Ernesto Leandro. 2012. “‘Diversity of Condricthyes and Osteichthyes in Three Marine Ecosystems: Mangrove, Coral Reef and Rocky of the Sub-Tidal Zone at San cristóbal island’”. Revista Universidad De Guayaquil 114 (3):27-36. https://doi.org/10.53591/rug.v114i3.464.