@inproceedings{DRR-2013-SchusterHME,
	author        = "Daniel Schuster and Marcel Hanke and Klemens Muthmann and Daniel Esser",
	booktitle     = "{Proceedings of the 20th Conference on Document Recognition and Retrieval}",
	doi           = "10.1117/12.2002509",
	isbn          = "978-0-819-49431-3",
	publisher     = "{SPIE}",
	series        = "{SPIE Proceedings}",
	title         = "{Rule-based versus training-based extraction of index terms from business documents: how to combine the results}",
	volume        = 8658,
	year          = 2013,
}