@misc{StrassnerRoehl2009,
  author    = {C Strassner and R. Roehl},
  title     = {Organic Certification of Hotels, Restaurants and Catering in Germany. Veranstaltung: 1st Nordic Organic Conference, G{\"o}teborg, Schweden, 18.-20.05.2009},
  institution = {Oecotrophologie · Facility Management (OEF)},
  type      = {lecture},
  year        = {2009},
}