@article{ref1,
title="Turtle: a prototype, real time, public transport information system focused on the needs of disabled older people",
journal="Studies in health technology and informatics",
year="1998",
author="Mullis, V. J. and Littlejohn, J. M.",
volume="48",
number="",
pages="235-239",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0926-9630",
doi="",
url="http://dx.doi.org/"
}