@article{ref1,
title="Quantifying spatial gaps in public transport supply based on social needs",
journal="Journal of transport geography",
year="2010",
author="Currie, G.",
volume="18",
number="1",
pages="31-41",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0966-6923",
doi="10.1016/j.jtrangeo.2008.12.002",
url="http://dx.doi.org/10.1016/j.jtrangeo.2008.12.002"
}