Bellwald, Philippe (1992). A contribution to the design of tunnels in argillaceous rock. Ph.D. dissertation, Massachusetts Institute of Technology. URI: https://dspace.mit.edu/handle/1721.1/12777
Bellwald, Philippe (1992). A contribution to the design of tunnels in argillaceous rock. Ph.D. dissertation, Massachusetts Institute of Technology. URI: https://dspace.mit.edu/handle/1721.1/12777