@inproceedings{CIKM-2014-WangPX,
	author        = "Xin Wang and Weike Pan and Congfu Xu",
	booktitle     = "{Proceedings of the 23rd ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2661829.2662021",
	isbn          = "978-1-4503-2598-1",
	pages         = "769--778",
	publisher     = "{ACM}",
	title         = "{HGMF: Hierarchical Group Matrix Factorization for Collaborative Recommendation}",
	year          = 2014,
}