@inproceedings{CIKM-2011-KongDH,
	author        = "Deguang Kong and Chris H. Q. Ding and Heng Huang",
	booktitle     = "{Proceedings of the 20th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2063576.2063676",
	isbn          = "978-1-4503-0717-8",
	pages         = "673--682",
	publisher     = "{ACM}",
	title         = "{Robust nonnegative matrix factorization using L21-norm}",
	year          = 2011,
}