@article{ref1,
title="Drivers' immediate responses to traffic signs",
journal="Ergonomics",
year="1984",
author="Summala, Heikki and Hietamaki, J.",
volume="27",
number="2",
pages="205-216",
abstract="Abstract unavailable.",
language="",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}