@inproceedings{DRR-2012-SchellenbergYZ,
	author        = "Thomas Schellenberg and Bo Yuan and Richard Zanibbi",
	booktitle     = "{Proceedings of the 19th Conference on Document Recognition and Retrieval}",
	doi           = "10.1117/12.912502",
	isbn          = "978-0-819-48944-9",
	publisher     = "{SPIE}",
	series        = "{SPIE Proceedings}",
	title         = "{Layout-based substitution tree indexing and retrieval for mathematical expressions}",
	volume        = 8297,
	year          = 2012,
}