Wijaya, Wellyanto, Paulus Pramono Rahardjo, and Aswin Lim. 2021. “Investigation of Twin Tunnel Deformation With Umbrella Grouting Protection & NATM Tunneling Using 3D Finite Element: Case Study Cisumdawu Tunnel”. UKaRsT 5 (2):252-67. https://doi.org/10.30737/ukarst.v5i2.1977.