@article{ref1,
title="Prioritisation of road maintenance operations using HDM-4 model : a case study",
journal="Indian highways",
year="2005",
author="Singh, Indrasen and Sreenivasulu, P.",
volume="33",
number="5",
pages="61-86.",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0376-7256",
doi="",
url="http://dx.doi.org/"
}