@techreport{WeischedelTuganovHermanssonetal.2012,
  author    = {C. Weischedel and A. Tuganov and T. Hermansson and J. Linn and M. Wardetzky},
  title     = {Construction of discrete shell models by geometric finite differences},
  institution = {Fraunhofer (ITWM)},
  series    = {Berichte des Fraunhofer-Instituts f{\"u}r Techno- und Wirtschaftsmathematik (ITWM Report)},
  number    = {220},
  pages     = {[23]},
  year      = {2012}
}