Punithavathi, R., and B. Kalaavathi. “Geographical Information Based Crop Yield Prediction Using Machine Learning”. Revista De La Facultad De Agronomía De La Universidad Del Zulia, Vol. 35, no. 1, Dec. 2017, pp. 128-3, https://produccioncientificaluz.org/index.php/agronomia/article/view/27264.