Sudrajat, Kukuh Mahi, Sri Prabandiyani Retno Wardani, and Kresno Wikan Sadono. “Case Study Method: Relationship Between Fully Softened and Residual Shear Angle and Liquid Limit in Problematic Clay Soil”. European Journal of Science, Innovation and Technology 5, no. 6 (December 26, 2025): 1-12. Accessed December 29, 2025. https://www.ejsit-journal.com/index.php/ejsit/article/view/728.