1. A shield adaptable to the requirements of supporting the face—the mix shield;Becker;Tunnel,1986
2. Water Jet Assisted Tunnel Boring;Ozdemir,1984
3. Exploration gallery for the Freudenstein Tunnel;Prommersberger;Tunnel,1986
4. Ground deformation ahead of and adjacent to a TBM in sheared shales at Stillwater Tunnel, Utah;Robinson,1985
5. Geophysical measurements related to tunnelling;Schwarz,1972