@misc{LiebetrauWeinrichProeter2014,
  author    = {Jan Liebetrau and S{\"o}ren Weinrich and J{\"u}rgen Pr{\"o}ter},
  title     = {Efficiency of biogas production. Conference of the European Biogas Association (EBA), Alkmaar, Niederlande, Oktober 2014},
  institution = {Energie · Geb{\"a}ude · Umwelt (EGU)},
  type      = {lecture},
  year        = {2014},
}