@INPROCEEDINGS {34504,
author={S.I. Lopes and J. Vieira and J.R. Reis and D.F.A. Albuquerque and N.B.C. Carvalho},
doi={},
booktitle={International Conference on Indoor Positioning and Indoor Navigation – IPIN},
title={Accurate Smartphone Indoor Positioning Using Non-Invasive Audio},
year={2013},
month={October},
volume={},
pages={-} 
}