@article{ref1,
title="Drivers' judgments of safe distances in vehicle following",
journal="Human factors",
year="1978",
author="Copeman, A. K. and Brown, I. D. and Colbourn, Christopher J.",
volume="20",
number="1",
pages="1-11",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}