Velázquez López, J. et al. 2019. Adoption of agricultural technology and its influence on productivity and competitiveness of maize in the central-eastern region of the state of Puebla, Mexico. Revista de Geografía Agrícola. 63 (Nov. 2019), 101–119. DOI:https://doi.org/10.5154/r.rga.2019.63.02.