@INPROCEEDINGS {3369,
author={S. Sargento and JP Barraca and R.  Aguiar},
doi={},
booktitle={IEEE International Symp. on Computers and Communications - ISCC},
title={A Lightweight and Secure Session-Aware Ad-Hoc Charging Protocol},
year={2005},
month={May},
volume={1},
pages={1-1} 
}