@conference {Constantin_aaai11,
	title = {On Expressing Value Externalities in Position Auctions},
	booktitle = {Proceedings of the 25th AAAI Conference on Artificial Intelligence (AAAI{\textquoteright}11)},
	year = {2011},
	pages = {644-649},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/constantin_aaai11.pdf},
	author = {Florin Constantin and Malvika Rao and Chien-Chung Huang and David C. Parkes}
}
