Meng, Chao, et al. “In-Situ Soil Texture Classification and Physical Clay Content Measurement Based on Multi-Source Information Fusion”. International Journal of Agricultural and Biological Engineering, vol. 16, no. 1, Mar. 2023, pp. 203-11, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6918.