@inproceedings{DocEng-2006-MacdonaldBL,
	author        = "Alexander J. Macdonald and David F. Brailsford and John W. Lumley",
	booktitle     = "{Proceedings of the Sixth Symposium on Document Engineering}",
	doi           = "10.1145/1166160.1166168",
	isbn          = "1-59593-515-0",
	pages         = "25--27",
	publisher     = "{ACM}",
	title         = "{Evaluating invariances in document layout functions}",
	year          = 2006,
}