J. P. Iñamagua-Uyaguari, A. Jenet, L. G. Alarcón-Guerra, S. J. Vilchez-Mendoza, F. Casasola-Coto, and M. A. Wattiaux, “Environmental and economic impacts of feeding strategies in Costa Rican dairy farms”., Agron. Mesoam., vol. 27, no. 1, pp. 1–17, Dec. 2015.