@article{ref1,
title="Exploring public transport usage trends in an ageing population",
journal="Transportation",
year="2010",
author="Currie, G. and Delbosc, Alexa",
volume="37",
number="1",
pages="151-164",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0049-4488",
doi="10.1007/s11116-009-9224-x",
url="http://dx.doi.org/10.1007/s11116-009-9224-x"
}