@inproceedings{DRR-2013-ZhuHZ,
	author        = "Siyu Zhu and Lei Hu and Richard Zanibbi",
	booktitle     = "{Proceedings of the 20th Conference on Document Recognition and Retrieval}",
	doi           = "10.1117/12.2008383",
	isbn          = "978-0-819-49431-3",
	publisher     = "{SPIE}",
	series        = "{SPIE Proceedings}",
	title         = "{Rotation-robust math symbol recognition and retrieval using outer contours and image subsampling}",
	volume        = 8658,
	year          = 2013,
}