@conference{SHM+13,
	author = {Daniel Schuster and Marcel Hanke and Klemens Muthmann and Daniel Esser},
	title = {Rule-based vs. Training-based Extraction of Index Terms from Business Documents - How to Combine the Results},
	booktitle = {Document Recognition and Retrieval XX (DRR), San Francisco, CA, USA},
	year = {2013}
}