@article{ref1,
title="Effects of sign design features and training on comprehension of traffic signs in Taiwanese and Vietnamese user groups",
journal="International journal of industrial ergonomics",
year="2012",
author="Ou, Yang-Kun and Liu, Yung-Ching",
volume="42",
number="1",
pages="1-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0169-8141",
doi="10.1016/j.ergon.2011.08.009",
url="http://dx.doi.org/10.1016/j.ergon.2011.08.009"
}