1. TBM tunnelling at Seabrook: Boreability and rock support;Blindheim,1980
2. Submarine tunnelling in poor rock;Carlsson;Tunnels & Tunnelling,1985
3. The Channel Tunnel—A technical description;Eurotunnel;Eurotunnel report,1987
4. The Vardø undersea tunnel—a low-cost project?;Grønhaug,1984
5. Survey of the Seikan Tunnel;Inoue;Tunnelling and Underground Space Technology,1986