@inproceedings{RecSys-2007-HarperSF,
	author        = "F. Maxwell Harper and Shilad Sen and Dan Frankowski",
	booktitle     = "{Proceedings of the First Conference on Recommender Systems}",
	doi           = "10.1145/1297231.1297262",
	isbn          = "978-1-59593-730-8",
	pages         = "165--168",
	publisher     = "{ACM}",
	title         = "{Supporting social recommendations with activity-balanced clustering}",
	year          = 2007,
}