@inproceedings{Kirsch2015,
  author    = {Ansgar Kirsch},
  title     = {Numerical investigation of the face stability of shallow tunnels in sand},
  booktitle = {Numerical methods in geotechnical engineering : (NUMGE 2010) : proceedings of the seventh European Conference on Numerical Methods in Geotechnical Engineering, Trondheim, Norway, 2 - 4 June 2010 / ed. by Thomas Benz ...},
  pages     = {779 -- 784},
  year      = {2015},
}