?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Pugesgaard%2C+S.&rft.aulast=Pugesgaard&rft.aufirst=S.&rft.date=2008&rft.title=Can+on-farm+bioenergy+production+make+organic+farming+more+sustainable%3F+-+A+model+for+energy+balance%2C+nitrogen+losses%2C+and+green+house+gas+emissions+in+a+1000+ha+energy+catchment+with+organic+dairy+farming+and+integrated+bioenergy+production&rft.genre=proceeding