Bery, Andy Anderson. “Development of Soil Cohesion and Friction Angle Models Using Multiple Linear Regression (MLR) Statistical Techniques”. Indonesian Journal on Geoscience 10, no. 1 (November 22, 2022): 15–25. Accessed July 3, 2024. https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/621.