Simatupang, Pintor Tua, Idrus M. Alatas, Ayu K. Redyananda, and Eko A. Purnomo. “Shear Strength and Durability Behaviors of Compacted Weathered Clay Shale Mixture Using Portland Cement”. Journal of the Civil Engineering Forum 8, no. 2 (May 25, 2022): 169-178. Accessed March 29, 2024. https://journal.ugm.ac.id/v3/JCEF/article/view/3491.