@inproceedings{ICDAR-1993-HerrmannS,
	author        = "Per Herrmann and Gunter Schlageter",
	booktitle     = "{Proceedings of the Second International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.1993.395678",
	isbn          = "0-8186-4960-7",
	pages         = "537--540",
	publisher     = "{IEEE}",
	title         = "{Retrieval of document images using layout knowledge}",
	year          = 1993,
}