@article{WetterElmar2008,
  author    = {Wetter, Christof and Elmar, Br{\"u}gging},
  title     = {Neue Aspekte f{\"u}r die G{\"a}rrestbehandlung},
  series = {Forum.new power},
  journal   = {Forum.new power},
  year      = {2008},
  language  = {de}
}
@article{WetterBruegging2008,
  author    = {Wetter, Christof and Br{\"u}gging, Elmar},
  title     = {Perspektivanalyse zur Entwicklung der Biogastechnologie im Zukunftskreis Steinfurt},
  series = {Download unter: www.fh-muenster.de/fb4/biogas},
  journal   = {Download unter: www.fh-muenster.de/fb4/biogas},
  year      = {2008},
  language  = {de}
}