@article{ref1,
title="Participation of the elderly in a transportation system",
journal="Gerontologist",
year="1982",
author="Matthews, S. H.",
volume="22",
number="1",
pages="26-31",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0016-9013",
doi="",
url="http://dx.doi.org/"
}