@incollection{TuerkRitthoffGeibleretal.2002,
  author    = {T{\"u}rk, Volker and Ritthoff, Michael and Geibler, Justus von and Kuhndt, Michael},
  title     = {Virtuell = umweltfreundlich? : Der {\"o}kologische Rucksack des Internets},
  booktitle = {Jahrbuch {\"O}kologie 2003},
  editor    = {Altner, G{\"u}nter},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  pages     = {110 -- 123},
  year      = {2002},
  language  = {de}
}