@inproceedings{ICDAR-2011-LiuLS,
	author        = "Li Liu and Yue Lu and Ching Y. Suen",
	booktitle     = "{Proceedings of the 11th International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.2011.29",
	isbn          = "978-1-4577-1350-7",
	pages         = "99--103",
	publisher     = "{IEEE Computer Society}",
	title         = "{Retrieval of Envelope Images Using Graph Matching}",
	year          = 2011,
}