@inproceedings{SIGMOD-2007-XinHC,
	author        = "Dong Xin and Jiawei Han and Kevin Chen-Chuan Chang",
	booktitle     = "{Proceedings of the 25th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1247480.1247494",
	isbn          = "978-1-59593-686-8",
	pages         = "103--114",
	publisher     = "{ACM}",
	title         = "{Progressive and selective merge: computing top-k with ad-hoc ranking functions}",
	year          = 2007,
}