@incollection{KirchgeorgMeffert1995,
  author    = {Kirchgeorg, Manfred and Meffert, Heribert},
  title     = {Einsatz der {\"o}kologischen Zertifizierung im Marketing},
  institution = {Chair of Marketing Management and Sustainability},
  year      = {1995},
  language  = {de}
}