@conference {Constantin10,
	title = {On Expressing Value Externalities in Position Auctions},
	booktitle = {Proceedings of the 6th Ad Auctions Workshop},
	year = {2010},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/constantin10.pdf},
	author = {Florin Constantin and Malvika Rao and Chien-Chung Huang and David C. Parkes}
}
