?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Bontems&rft.aufirst=Philippe&rft.issue=3&rft.volume=26&rft.date=September+2004&rft.atitle=Optimal+Regulation+of+Private+Production+Contracts+with+Environmental+Externalities&rft.title=Journal+of+Regulatory+Economics&rft.pages=287-301&rft.genre=article