@inproceedings{ICDAR-1997-HullC,
	author        = "Jonathan J. Hull and John F. Cullen",
	booktitle     = "{Proceedings of the Fourth International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.1997.619862",
	isbn          = "0-8186-7898-4",
	pages         = "308--313",
	publisher     = "{IEEE Computer Society}",
	title         = "{Document image similarity and equivalence detection}",
	year          = 1997,
}