@inproceedings{CIKM-2012-ZhengFY,
	author        = "Wei Zheng and Hui Fang and Conglei Yao",
	booktitle     = "{Proceedings of the 21st ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2396761.2398529",
	isbn          = "978-1-4503-1156-4",
	pages         = "1844--1848",
	publisher     = "{ACM}",
	title         = "{Exploiting concept hierarchy for result diversification}",
	year          = 2012,
}