@book{StrassnerLukasLoes2010,
  author    = {C Strassner and M Lukas and A-K L{\o}es},
  title     = {Certification of public organic procurement in Denmark, Finland, Italy and Norway as compared to Germany. ipopy discussion paper 5/2010},
  edition   = {Vol. 5 No. 103/2010},
  isbn      = {ISBN 978-82-17-006},
  year      = {2010},
}