@ARTICLE {15521,
author={S.I. Lopes and J. Vieira and J.R. Reis and N.B.C. Carvalho},
doi={10.1016/j.pmcj.2014.09.003},
journal={Pervasive and Mobile Computing},
title={Accurate smartphone indoor positioning using a WSN infrastructure and non-invasive audio for TDoA estimation},
year={2015},
month={July},
volume={20},
number={0},
pages={29-46},
ISSN={1574-1192}
}