?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Vainio-Mattila%2C+Birgitta&rft.aulast=Vainio-Mattila&rft.aufirst=Birgitta&rft.date=2007&rft.title=Various+measures+to+achieve+the+EU+goal+for+the+use+of+bioenergy+with+special+focus+on+field+energy.+Challenges+for+agricultural+policy&rft.genre=proceeding