@inproceedings{RecSys-2008-ParkT,
	author        = "Yoon-Joo Park and Alexander Tuzhilin",
	booktitle     = "{Proceedings of the Second Conference on Recommender Systems}",
	doi           = "10.1145/1454008.1454012",
	isbn          = "978-1-60558-093-7",
	pages         = "11--18",
	publisher     = "{ACM}",
	title         = "{The long tail of recommender systems and how to leverage it}",
	year          = 2008,
}