1. Kasumigaura Water Conveyance Project. Tunnelling Activities in Japan;Tanimura,1998
2. Underground River aiming at a flood-free world city, Tokyo. Tokyo Metropolitan Government.
3. Lesotho Highlands water project—design and construction of the transfer tunnel. Proc. Instn. Ciu Engrs;Boniface,1997
4. Rohde J.K.J., Knudsmoen M., Nakken R. Western Oslofjord Sewarage Scheme. pp. 23–28.
5. Parameters regulating groundwater inflows into hard rock tunnels—a statistical study of the Bolmen tunnel in southern Sweden;Cesano;Tunnel. Underground Space Technol.,2000