Karyoti, A., E. Hatzigiannakis, D. Bartzialis, and N. Danalatos. “Spatial Variation Assessment of Selected Soil Properties for Precision Field Experimentation”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 35, no. 1, Sept. 2017, pp. 352-63, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3352.