@INPROCEEDINGS {14177,
author={J. Dias and A. Oliveira and J. M.  Matos},
booktitle={IARIA International Conf. on Advances in Vehicular Systems, Technologies and Applications - VEHICULAR 2013},
title={The Charge Collector System (C2S) – A New NFC and Smartphone-based Toll Collection System},
year={2013},
month={July},
volume={1},
pages={1-2} 
}