Franzen, T., Bergdahl, S., & Nordmark, A. (1998). Underground construction in modern infrastructure: Proceedings of the International Conference on Underground Construction in Modern Infrastructure, Stockholm, Sweden, 7-9 June 1998. Rotterdam Brookfield, VT: Balkema.
Παραπομπή Chicago StyleFranzen, Tomas, Sven-Gunnar Bergdahl, and Annica Nordmark. Underground Construction in Modern Infrastructure: Proceedings of the International Conference On Underground Construction in Modern Infrastructure, Stockholm, Sweden, 7-9 June 1998. Rotterdam Brookfield, VT: Balkema, 1998.
Παραπομπή MLAFranzen, Tomas, Sven-Gunnar Bergdahl, and Annica Nordmark. Underground Construction in Modern Infrastructure: Proceedings of the International Conference On Underground Construction in Modern Infrastructure, Stockholm, Sweden, 7-9 June 1998. Rotterdam Brookfield, VT: Balkema, 1998.