@inproceedings{Kirsch2009,
  author    = {Kirsch, Ansgar},
  title     = {Experimental and numerical investigation of the face stability of shallow tunnels in sand},
  series = {Safe tunnelling for the city and environment : proceedings of the World Tunnel Congress 2009, Budapest, Hungary, 23 to 28 September 2009 / organised by International Tunnelling and Underground Space Association ...},
  booktitle = {Safe tunnelling for the city and environment : proceedings of the World Tunnel Congress 2009, Budapest, Hungary, 23 to 28 September 2009 / organised by International Tunnelling and Underground Space Association ...},
  publisher = {Hungarian Tunnelling Association},
  address   = {Budapest},
  organization    = {World Tunnel Congress <2009, Budapest>},
  pages     = {1 -- 8},
  year      = {2009},
  language  = {en}
}
@inproceedings{FellinKingKirschetal.2009,
  author    = {Fellin, Wolfgang and King, Julian and Kirsch, Ansgar and Oberguggenberger, Michael},
  title     = {Uncertainty modelling and sensitivity analysis of tunnel face stability},
  series = {Safety, reliability and risk of structures, infrastructures and engineering systems : proceedings of the tenth International Conference on Structural Safety and Reliability (ICOSSAR 2009), Osaka, Japan, 13-17 September 2009 / ed.: Hitoshi Furuta ...},
  booktitle = {Safety, reliability and risk of structures, infrastructures and engineering systems : proceedings of the tenth International Conference on Structural Safety and Reliability (ICOSSAR 2009), Osaka, Japan, 13-17 September 2009 / ed.: Hitoshi Furuta ...},
  publisher = {CRC Pr.},
  address   = {Boca Raton, Fla. [u.a.]},
  organization    = {International Conference on Structural Safety and Reliability <10, 2009, Osaka>},
  isbn      = {978-0-415-47557-0},
  pages     = {112 -- 114},
  year      = {2009},
  language  = {en}
}