@inproceedings{ICDAR-2009-LuYSS,
	author        = "Tong Lu and Yubin Yang and Feng Su and Zhengxing Sun",
	booktitle     = "{Proceedings of the 10th International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.2009.34",
	isbn          = "978-0-7695-3725-2",
	pages         = "723--727",
	publisher     = "{IEEE Computer Society}",
	title         = "{Semi-automatic Roof Reconstruction}",
	year          = 2009,
}