@inproceedings{RecSys-2008-Zanker,
	author        = "Markus Zanker",
	booktitle     = "{Proceedings of the Second Conference on Recommender Systems}",
	doi           = "10.1145/1454008.1454032",
	isbn          = "978-1-60558-093-7",
	pages         = "139--146",
	publisher     = "{ACM}",
	title         = "{A collaborative constraint-based meta-level recommender}",
	year          = 2008,
}