@inproceedings{CIKM-2009-HeZL,
	author        = "Jing He and Chengxiang Zhai and Xiaoming Li",
	booktitle     = "{Proceedings of the 18th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1645953.1646293",
	isbn          = "978-1-60558-512-3",
	pages         = "2029--2032",
	publisher     = "{ACM}",
	title         = "{Evaluation of methods for relative comparison of retrieval systems based on clickthroughs}",
	year          = 2009,
}