@conference {Chan07,
	title = {Accessible spaces: Navigating through a marked environment with a camera phone},
	booktitle = {Proceedings of the 9th International ACM Conference on Computers and Accessibility (ASSETS 2007)},
	year = {2007},
	pages = {229-230},
	keywords = {Blind wayfinding},
	url = {http://users.soe.ucsc.edu/~manduchi/papers/de115-manduchi.pdf},
	author = {Chan,Kee-Yip and Roberto Manduchi and Coughlan, J.}
}
