@incollection{PetersenWilke1999,
  author    = {Petersen, Rudolf and Wilke, Georg},
  title     = {Wie kann Stadtverkehr {\"o}kologischer werden?},
  booktitle = {Jahrbuch {\"O}kologie 2000},
  editor    = {Altner, G{\"u}nter},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  pages     = {53 -- 60},
  year      = {1999},
  language  = {de}
}