Harmsen, E. W., A. González-Pérez, and A. Winter. “Re-Evaluation of Pan Evaporation Coefficients at Seven Locations in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico, vol. 88, no. 3-4, Oct. 2004, pp. 109-22, doi:10.46429/jaupr.v88i3-4.1091.