Velamala, Ranga Rao, and Pawan Kumar Pant. “SFMToolbox: An ArcGIS Python Toolbox for Automatic Production of Maps of Soil Fertility”. Geomatics and Environmental Engineering 17, no. 2 (January 30, 2023): 105–145. Accessed August 21, 2025. https://www.gaee.agh.edu.pl/gaee/article/view/440.