@inproceedings{DRR-2013-NayefB13a,
	author        = "Nibal Nayef and Thomas M. Breuel",
	booktitle     = "{Proceedings of the 20th Conference on Document Recognition and Retrieval}",
	doi           = "10.1117/12.2008532",
	isbn          = "978-0-819-49431-3",
	publisher     = "{SPIE}",
	series        = "{SPIE Proceedings}",
	title         = "{Efficient symbol retrieval by building a symbol index from a collection of line drawings}",
	volume        = 8658,
	year          = 2013,
}