?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Stassart%2C+Dr.+Pierre&rft.aulast=Stassart&rft.aufirst=Pierre&rft.date=2006&rft.title=How+to+fear+farming+system+sustainability+%3F+Application+to+organic+cattle+meat+production+&rft.genre=proceeding