@INPROCEEDINGS {6683,
author={V. N. G. J. S. Soares and P. A. C. S. N. Neves and J. R. Rodrigues},
doi={},
booktitle={IARIA International Conf. on Communication Theory, Reliability, and Quality of Service - CTRQ},
title={Past, Present and Future of IP telephony},
year={2008},
month={July},
volume={CD},
pages={---} 
}