Álvarez, F. S., D. Herrerea, and A. Angulo. “First Record of the Highfin Goby Gobionellus Oceanicus (Gobiiformes: Gobiidae) in Costa Rican Freshwaters”. UNED Research Journal, vol. 10, no. 2, Sept. 2018, pp. 404-8, doi:10.22458/urj.v10i2.2169.