@incollection{KnorrEichinger2004,
  author    = {Knorr, Andreas and Eichinger, Andreas},
  title     = {Die Auswirkungen des 11. September 2001 auf den Weltluftverkehr},
  series = {See- und Luftverkehrsm{\"a}rkte im Umbruch},
  booktitle = {See- und Luftverkehrsm{\"a}rkte im Umbruch},
  editor    = {Knorr, Andreas and Schauf, Tobias},
  publisher = {LIT},
  address   = {M{\"u}nster},
  isbn      = {978-3-8258-8236-5},
  publisher      = {Deutsche Universit{\"a}t f{\"u}r Verwaltungswissenschaften},
  pages     = {75 -- 82},
  year      = {2004},
  abstract  = {.},
  language  = {de}
}
@article{KnorrEichinger2004,
  author    = {Knorr, Andreas and Eichinger, Andreas},
  title     = {Congestion Charging - das Beispiel Londons},
  series = {Internationales Verkehrswesen},
  volume    = {56},
  journal   = {Internationales Verkehrswesen},
  publisher = {Trialog Publishers Verlagsgesellschaft},
  address   = {Baiersbronn},
  pages     = {366 -- 371},
  year      = {2004},
  abstract  = {.},
  language  = {de}
}