@inproceedings{STOC-2001-BartalCR,
	author        = "Yair Bartal and Moses Charikar and Danny Raz",
	booktitle     = "{Proceedings of the 33rd Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/380752.380754",
	isbn          = "1-58113-349-9",
	pages         = "11--20",
	publisher     = "{ACM}",
	title         = "{Approximating min-sum k-clustering in metric spaces}",
	year          = 2001,
}