@techreport{PetersenBoehlerDalkmannetal.1998,
  author    = {Petersen, Rudolf and B{\"o}hler, Susanne and Dalkmann, Holger and Ahrens, Andreas},
  title     = {An agenda 21 for the Baltic Sea Region : transport sector report},
  series = {Texte / Umweltbundesamt},
  volume    = {1998,38},
  institution = {Umweltbundesamt},
  address   = {Berlin},
  pages     = {137},
  year      = {1998},
  language  = {en}
}