@inproceedings{RecSys-2007-WebsterV,
	author        = "Andrew Webster and Julita Vassileva",
	booktitle     = "{Proceedings of the First Conference on Recommender Systems}",
	doi           = "10.1145/1297231.1297264",
	isbn          = "978-1-59593-730-8",
	pages         = "173--176",
	publisher     = "{ACM}",
	title         = "{The keepup recommender system}",
	year          = 2007,
}