@inproceedings{SIGMOD-2009-ChenWLL,
	author        = "Yi Chen and Wei Wang and Ziyang Liu and Xuemin Lin",
	booktitle     = "{Proceedings of the 27th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1559845.1559966",
	isbn          = "978-1-60558-551-2",
	pages         = "1005--1010",
	publisher     = "{ACM}",
	title         = "{Keyword search on structured and semi-structured data}",
	year          = 2009,
}