Chassoul Acosta, M. J., and C. Rodríguez Arias. “Pollution and Reduction of the El Laguito Reservoir, Costa Rica, by Urban Waters: Survey and Physical-Chemical Properties”. UNED Research Journal, vol. 10, no. 2, Sept. 2018, pp. 409-15, doi:10.22458/urj.v10i2.2006.