Rivera, Edmundo, and José Rodríguez. “Forage Yield of Five Grasses Under Intensive Grazing Management in the Humid Region of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 64, no. 3 (July 1, 1980): 259–263. Accessed January 31, 2023. https://revistas.upr.edu/index.php/jaupr/article/view/10209.