Yazman, J. A., J. Velez-Santiago, J. A. Arroyo-Aguilu, and R. E. McDowell. “Evaluation of Five Tropical Grasses for Growing Holstein Heifers”. The Journal of Agriculture of the University of Puerto Rico, vol. 67, no. 2, Apr. 1983, pp. 79-94, doi:10.46429/jaupr.v67i2.7696.