@inproceedings{RecSys-2009-LuAD,
	author        = "Zhengdong Lu and Deepak Agarwal and Inderjit S. Dhillon",
	booktitle     = "{Proceedings of the Third Conference on Recommender Systems}",
	doi           = "10.1145/1639714.1639719",
	isbn          = "978-1-60558-435-5",
	pages         = "13--20",
	publisher     = "{ACM}",
	title         = "{A spatio-temporal approach to collaborative filtering}",
	year          = 2009,
}