Wijaya, Wellyanto, Paulus Pramono Rahardjo, and Aswin Lim. “Investigation of Twin Tunnel Deformation With Umbrella Grouting Protection & NATM Tunneling Using 3D Finite Element: Case Study Cisumdawu Tunnel”. UKaRsT 5, no. 2 (December 20, 2021): 252–267. Accessed May 11, 2024. https://ojs.unik-kediri.ac.id/index.php/ukarst/article/view/1977.