@inproceedings{RecSys-2009-ParraB,
	author        = "Denis Parra and Peter Brusilovsky",
	booktitle     = "{Proceedings of the Third Conference on Recommender Systems}",
	doi           = "10.1145/1639714.1639757",
	isbn          = "978-1-60558-435-5",
	pages         = "237--240",
	publisher     = "{ACM}",
	title         = "{Collaborative filtering for social tagging systems: an experiment with CiteULike}",
	year          = 2009,
}