Rampim, L., M. C. Lana, A. Feiden, J. Klein, M. V. Sarto, J. S. Rosset, and P. V. Dal Molin. “Management Units in Precision Agriculture System in the Soybean Crop”. Scientia Agraria Paranaensis, vol. 11, Jan. 2000, pp. 70-83, doi:10.18188/sap.v11i0.7872.