@ARTICLE {30185,
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},
journal={Civil-Comp Proceedings},
title={Topographic modelling of a railway track using a global navigation satellite system},
year={2012},
month={April},
volume={98},
number={2012},
pages={2067-2081},
ISSN={1759-3433}
}