@article{ref1,
title="Epidemiology and diagnosis in low back injury",
journal="Occupational health and safety",
year="1981",
author="Nordby, E. J.",
volume="50",
number="1",
pages="38-42",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0362-4064",
doi="",
url="http://dx.doi.org/"
}