Martínez-Rodríguez, G. A.; Santos-Flores, C. J.; Macchiavelli, R.; Sotomayor-Ramírez, D.; Pérez-Alegría, L. Nutrient Levels Associated With Ecological Thresholds of Impairment: An Approach to Estimate Numeric Nutrient Criteria for Reservoirs of Puerto Rico. JAUPR 2015, 99, 63-86.