@inproceedings{PODS-2012-DengFG,
	author        = "Ting Deng and Wenfei Fan and Floris Geerts",
	booktitle     = "{Proceedings of the 31st Symposium on Principles of Database Systems}",
	doi           = "10.1145/2213556.2213592",
	isbn          = "978-1-4503-1248-6",
	pages         = "261--272",
	publisher     = "{ACM}",
	title         = "{On the complexity of package recommendation problems}",
	year          = 2012,
}