?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Kongsted%2C+Anne+Grete&rft.aulast=Kongsted&rft.aufirst=Anne+Grete&rft.date=2006&rft.title=Outdoor+multi-sire+mating+system%3A+A+feasible+way+for+organic+piglet+production%3F&rft.genre=proceeding