@INPROCEEDINGS {2258,
author={S. Sargento},
doi={},
booktitle={International Conf. on Telecommunications - ICT},
title={The charging process to be implemented will comprise the basis charging mechanisms for unicast traffic, integration with QoS and access control mechanisms, and integration with the Authentication, Authorization, Accounting, Auditing and Charging (A4C) ser},
year={2004},
month={August},
volume={1},
pages={1-1} 
}