@INPROCEEDINGS {14052,
author={N. M. C- Dias and N. P. F. Henriques and J. M. F. Calado and M.R.A. Calado and S.J.P.S. Mariano},
doi={10.4203/ccp.98.145},
booktitle={International Conf. on Railway Technology Research - Railways 2012},
title={Topographic Modelling of a Railway Track using a Global Navigation Satellite System},
year={2012},
month={April},
volume={1},
pages={2067-2080} 
}