Santillano-Cázares, Jesús. “Use of Optical Sensor Technology for the Fertilization of Wheat (Triticum Aestivum L.)”. REVISTA TERRA LATINOAMERICANA, vol. 31, no. 2, June 2013, pp. 95-103, https://terralatinoamericana.org.mx/index.php/terra/article/view/1016.