@inproceedings{RecSys-2009-OMahonyS,
	author        = "Michael P. O'Mahony and Barry Smyth",
	booktitle     = "{Proceedings of the Third Conference on Recommender Systems}",
	doi           = "10.1145/1639714.1639774",
	isbn          = "978-1-60558-435-5",
	pages         = "305--308",
	publisher     = "{ACM}",
	title         = "{Learning to recommend helpful hotel reviews}",
	year          = 2009,
}