Tuomas Sandholm Andrew Gilpin Sequences of Take-It-or-Leave-It Offers: Near-Optimal Auctions Without Full Valuation Revelation. 73-91 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3048&spage=73 2003 conf/amec/2003 AMEC db/conf/amec/amec2003.html#SandholmG03