@article{Hebel2009,
  author    = {Hebel, Christoph},
  title     = {Einsatz von makroskopischen Personalnachfragemodellen in der Planungspraxis},
  series = {Stadt Region Land (2009)},
  journal   = {Stadt Region Land (2009)},
  publisher = {ISB},
  address   = {Aachen},
  isbn      = {978-3-88354-157-0},
  pages     = {63 -- 66},
  year      = {2009},
  language  = {de}
}
@article{SchmidtHebel2009,
  author    = {Schmidt, Rolf and Hebel, Christoph},
  title     = {Makroskopische Verkehrssimulationsmodelle in der kommunalen Planungspraxis},
  series = {Stadt Region Land (2009)},
  journal   = {Stadt Region Land (2009)},
  publisher = {RWTH Aachen},
  address   = {Aachen},
  isbn      = {0344-9645},
  pages     = {63 -- 72},
  year      = {2009},
  language  = {de}
}