@INPROCEEDINGS {11817,
author={J. Sanguino and S. M. Marques and L. P. Pontes and J. Leitão},
doi={},
booktitle={ESA DASIA},
title={Operational Aspects of a DGPS-based Vessel Traffic System},
year={2000},
month={May},
volume={--},
pages={637-641} 
}