@article{ref1,
title="Detection of the sign of relative motion when following a vehicle",
journal="Human factors",
year="1974",
author="Rothery, Richard W. and Evans, Leonard",
volume="16",
number="2",
pages="161-173",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}