@conference {coughlan09b,
	title = {A Mobile Phone Wayfinding System for Visually Impaired Users},
	booktitle = {Proc. AAATE},
	year = {2009},
	keywords = {Blind wayfinding},
	url = {http://users.soe.ucsc.edu/~manduchi/papers/AAATE.pdf},
	author = {Coughlan, J. and Roberto Manduchi}
}
