@article{ref1,
title="The use of intermediate criteria for evaluating the effectiveness of accident countermeasures",
journal="Human factors",
year="1976",
author="Shaoul, J. E.",
volume="18",
number="6",
pages="575-591",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}