Carvajal Pérez, Luis Alfredo, et al. “Cost of Production of Bovine Milk in Three Silvopastoral Systems: Alder (Alnus acuminata), Acacia (Acacia Melanoxylon) and a Control With Forage Mix”. Tierra Infinita, vol. 5, no. 1, Dec. 2019, pp. 118-23, https://doi.org/10.32645/26028131.964.