@techreport{RoennauSchallaboeckWolfetal.2003,
  author    = {R{\"o}nnau, Hans Joachim and Schallab{\"o}ck, Karl Otto and Wolf, Rainer and H{\"u}sing, J. Martin},
  title     = {Umweltpolitische Handlungsempfehlungen f{\"u}r die Finanzierung des {\"O}PNV. Band A: Sozio-{\"o}konomische Grundlagen},
  series = {Texte / Umweltbundesamt},
  volume    = {2003,29},
  institution = {Umweltbundesamt},
  address   = {Berlin},
  pages     = {148},
  year      = {2003},
  language  = {de}
}