?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Guo%2C+M&rft.aulast=Guo&rft.aufirst=M&rft.date=December+2011&rft.atitle=Budget-Balanced+and+Nearly+Efficient+Randomized+Mechanisms%3A+Public+Goods+and+Beyond&rft.title=Proc.+of+the+7th+Workshop+on+Internet+and+Network+Economics&rft.genre=article