@INPROCEEDINGS {2221,
author={A. Freitas and M.P. Queluz and A. J. Rodrigues},
doi={},
booktitle={Encontro de Utilizadores de Sistemas de Informação Geográfica},
title={Evaluation of Geographical Information QoS in Location Based Services Using GIS},
year={2004},
month={June},
volume={--},
pages={-----} 
}