@article{ref1,
title="Procedures for the Reduction of Errors in Road Network Data",
journal="Operational research quarterly",
year="1974",
author="Ginsburgh, V. and Hansen, P.",
volume="25",
number="2",
pages="321-322",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0030-3623",
doi="",
url="http://dx.doi.org/"
}