?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Schwank%2C+Othmar&rft.aulast=Schwank&rft.aufirst=Othmar&rft.date=2008&rft.title=The+role+of+the+carbon+market+in+transformation+of+agriculture+towards+organic+and+sustainability&rft.genre=proceeding