@article{ref1,
title="Geographic information systems and transportation -- overview",
journal="Transportation planning and technology",
year="1998",
author="Sutton, John and Gillingwater, David",
volume="21",
number="1-2",
pages="1-4",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0308-1060",
doi="10.1080/03081069708717598",
url="http://dx.doi.org/10.1080/03081069708717598"
}