@conference {parkes99,
	title = {Optimal Auction Design for Agents with Hard Valuation Problems},
	booktitle = {Proc. IJCAI-99 Workshop on Agent Mediated Electronic Commerce},
	year = {1999},
	month = {July},
	pages = {206{\textendash}219},
	address = {Stockholm, Sweden},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/springer-valuation.pdf},
	author = {David C. Parkes}
}
