@misc{WetterBruegging2006,
  author    = {Christof Wetter and Elmar Br{\"u}gging},
  title     = {Wirtschaftlichkeit von Biogasanlagen},
  institution = {Energie · Geb{\"a}ude · Umwelt (EGU)},
  type      = {lecture},
  year        = {2006},
}