@article{ref1,
title="Boarding and alighting times for elderly persons using special bus service",
journal="Journal of advanced transportation",
year="1986",
author="Alfa, A. and Heads, J.",
volume="20",
number="1",
pages="89-95",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0197-6729",
doi="",
url="http://dx.doi.org/"
}