Espinosa, A., M. A. López, and M. Tadeo. “Agroeeonomic Analysis of the Use of Advaneed Generations of Improved Eorn Seed in High Valleys of Mexico”. Agronomía Mesoamericana, vol. 9, no. 1, May 2016, pp. 53-58, doi:10.15517/am.v9i1.24629.