Arroyo-Aguilú, José A., and Luis Rivera-Brenes. “Relationship Between the Percentages of Crude Protein and Apparently Digestible Protein in Some Forages of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico, vol. 49, no. 1, Jan. 2022, pp. 145-8, doi:10.46429/jaupr.v49i1.13016.