@article{ref1,
title="A comparison of heart rates during blind mobility and car driving",
journal="Ergonomics",
year="1976",
author="Heyes, A. D. and Armstrong, J. D. and Willans, P. R.",
volume="19",
number="4",
pages="489-497",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}