@article{ref1,
title="Causal-factors research: valuable tool",
journal="International journal of occupational health and safety",
year="1975",
author="Ramsey, J. D.",
volume="44",
number="4",
pages="26-8, 35",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0093-2205",
doi="",
url="http://dx.doi.org/"
}