@inproceedings{STOC-2000-GuptaT,
	author        = "Anupam Gupta and Éva Tardos",
	booktitle     = "{Proceedings of the 32nd Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/335305.335397",
	isbn          = "1-58113-184-4",
	pages         = "652--658",
	publisher     = "{ACM}",
	title         = "{A constant factor approximation algorithm for a class of classification problems}",
	year          = 2000,
}