@inproceedings{SIGIR-2010-WangDL,
	author        = "Dingding Wang and Chris H. Q. Ding and Tao Li",
	booktitle     = "{Proceedings of the 33rd International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1835449.1835625",
	isbn          = "978-1-4503-0153-4",
	pages         = "805--806",
	publisher     = "{ACM}",
	title         = "{Feature subset non-negative matrix factorization and its applications to document understanding}",
	year          = 2010,
}