@article{ref1,
title="The Effectiveness of Curved Surface Traffic Markers",
journal="Human factors",
year="1964",
author="Nelson, Thomas M.",
volume="6",
number="4",
pages="365-370",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}