@inproceedings{CIKM-2012-ZhangWH,
	author        = "Qi Zhang and Yan Wu and Xuanjing Huang",
	booktitle     = "{Proceedings of the 21st ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2396761.2398651",
	isbn          = "978-1-4503-1156-4",
	pages         = "2399--2402",
	publisher     = "{ACM}",
	title         = "{Selecting expansion terms as a set via integer linear programming}",
	year          = 2012,
}