Umaña-Villalobos, Gerardo, Lidia Avilés-Vargas, and Octavio Esquivel-Garrote. 2018. “Zooplankton Variation in Fraijanes Lake (Costa Rica) During the Course of One Year”. Revista De Biología Tropical 66 (S1):S123–S131. https://doi.org/10.15517/rbt.v66i1.33267.