@inproceedings{ICDAR-2007-HirayamaNK,
	author        = "Jun'ichi Hirayama and Hidehisa Nakayama and Nei Kato",
	booktitle     = "{Proceedings of the Ninth International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.2007.4",
	isbn          = "978-0-7695-2822-9",
	pages         = "432--436",
	publisher     = "{IEEE Computer Society}",
	title         = "{A Classifier of Similar Characters using Compound Mahalanobis Function based on Difference Subspace}",
	year          = 2007,
}