@unpublished{StahlSandhaasWilke2013,
  author  = {Katja Stahl and Anna Sandhaas and Andreas Wilke},
  title   = {Development and Improvement of an enzyme producing bioreactor to enhance the methane yield in a biogas process},
  institution = {Fakult{\"a}t Maschinenbau und Verfahrenstechnik (M+V)},
  year    = {2013},
  language  = {en}
}