@inproceedings{CIKM-2006-PengH,
	author        = "Yefei Peng and Daqing He",
	booktitle     = "{Proceedings of the 15th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1183614.1183740",
	isbn          = "1-59593-433-2",
	pages         = "806--807",
	publisher     = "{ACM}",
	title         = "{Direct comparison of commercial and academic retrieval system: an initial study}",
	year          = 2006,
}