Virgen-Vargas, J., R. Zepeda-Bautista, M. Ávila-Perches, A. Espinosa-Calderón, J. Arellano-Vázquez, and A. Gómez-Vázquez. “Seed Production Lines of Maize: Population Density and Interaction.”. Agronomía Mesoamericana, Vol. 25, no. 2, July 2014, pp. 323-35, doi:10.15517/am.v25i2.15439.