Torres, C., Ruiz, T., Martínez, G.A. and Sotomayor-Ramírez, D. 2009. Evidence for excess dietary phosphorus on dairy farms with rotational grazing of tropical grasses. The Journal of Agriculture of the University of Puerto Rico. 93, 1-2 (Apr. 2009), 23–40. DOI:https://doi.org/10.46429/jaupr.v93i1-2.2751.