@article{ref1,
title="Speed perception fogs up as visibility drops",
journal="Nature",
year="1998",
author="Snowden, R. J. and Stimpson, N. and Ruddle, R. A.",
volume="392",
number="6675",
pages="450-450",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="10.1038/33049",
url="http://dx.doi.org/10.1038/33049"
}