Sierra-Alarcón, A. M., Y. Moreno-Oviedo, E. A. Mancipe-Muñoz, Y. Avellaneda-Avellaneda, and J. de J. Vargas-Martínez. “Effect of Nitrogen and Phosphate Fertilization on Perennial Ryegrasses and Red Clovers: Evaluation of Nitrogen and Phosphate Fertilization on Perennial Ryegrasses and Red Clovers”. Agronomía Mesoamericana, vol. 30, no. 3, Sept. 2019, pp. 841-54, doi:10.15517/am.v30i3.35170.