@inproceedings{RecSys-2009-GunawardanaM,
	author        = "Asela Gunawardana and Christopher Meek",
	booktitle     = "{Proceedings of the Third Conference on Recommender Systems}",
	doi           = "10.1145/1639714.1639735",
	isbn          = "978-1-60558-435-5",
	pages         = "117--124",
	publisher     = "{ACM}",
	title         = "{A unified approach to building hybrid recommender systems}",
	year          = 2009,
}