Calvo-Vargas, Emilia, Jorge Boza-Abarca, and Karen Berrocal-Artavia. 2014. “Effects of El Niño Y La Niña over Marine Microphytoplankton Behavior and Physical-Chemical Variables During the 2008-2010 Period in the Gulf of Nicoya, Costa Rica”. Revista Ciencias Marinas Y Costeras 6 (October): 115-33. https://doi.org/10.15359/revmar.6.8.