@article{ref1,
title="Basic principles for precautionary labeling",
journal="Industrial medicine and surgery",
year="1960",
author="Hogan, E. J.",
volume="29",
number="",
pages="530-533",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0019-8536",
doi="",
url="http://dx.doi.org/"
}