@inproceedings{CIKM-2012-SandersonTZS,
	author        = "Mark Sanderson and Andrew Turpin and Ying Zhang and Falk Scholer",
	booktitle     = "{Proceedings of the 21st ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2396761.2398553",
	isbn          = "978-1-4503-1156-4",
	pages         = "1965--1969",
	publisher     = "{ACM}",
	title         = "{Differences in effectiveness across sub-collections}",
	year          = 2012,
}