Ilias Diakonikolas Christos H. Papadimitriou George Pierrakos Yaron Singer Efficiency-Revenue Trade-Offs in Auctions. 488-499 2012 ICALP (2) https://doi.org/10.1007/978-3-642-31585-5_44 conf/icalp/2012-2 db/conf/icalp/icalp2012-2.html#DiakonikolasPPS12