Galván-Antonio, A., M. Sánchez-Hernández, F. Calderón-Sánchez, y J. de D. Guerrero-Rodríguez. 2021. «Characterization of Subsistence Sheep Farming: The Case of Three Communities of the Municipality of Tlahuapan, Puebla, Mexico». Agro Productividad 13 (12). https://doi.org/10.32854/agrop.v13i12.1899.