Umaña-Villalobos, G., Avilés-Vargas, L. and Esquivel-Garrote, O. (2018) “Zooplankton variation in Fraijanes Lake (Costa Rica) during the course of one year”, Revista de Biología Tropical, 66(S1), pp. S123–S131. doi: 10.15517/rbt.v66i1.33267.