Sánchez-Toledano, B. I., Z. Kallas, and J. M. Gil-Roig. “Farmer Preference for Improved Corn Seeds in Chiapas, Mexico: A Choice Experiment Approach”. Spanish Journal of Agricultural Research, Vol. 15, no. 3, Dec. 2017, p. e0116, doi:10.5424/sjar/2017153-11096.