@inproceedings{Briest/etal/Approximation/05,
	year	= {2005},
	title	= {Approximation Techniques for Utilitarian Mechanims Design},
	booktitle	= {Proc. 37th Ann. ACM. Symp. on Theory of Comput. (STOC)},
	author	= {Briest, Patrick and Krysta, Piotr and V{\"o}cking, Berthold}
}