@conference {boutilier08,
	title = {Expressive Banner Ad auctions and Model-based Online Optimization for Clearing},
	booktitle = {Proc. 23rd AAAI Conference on Artificial Intelligence (AAAI{\textquoteright}08)},
	year = {2008},
	pages = {30{\textendash}37},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/walsh08_banner.pdf},
	author = {Craig Boutilier and David C. Parkes and Tuomas Sandholm and William E. Walsh}
}
