@article{ref1,
title="Health, fitness, physical activity, and morbidity of middle aged factory workers. I",
journal="British journal of industrial medicine",
year="1987",
author="Cotes, J. E.",
volume="44",
number="3",
pages="214-215",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1072",
doi="",
url="http://dx.doi.org/"
}