@article{ref1,
title="Death rates among the Italian railroad employees, with special reference to coronary heart disease and physical activity at work",
journal="Environmental research",
year="1976",
author="Menotti, A. and PUDDU, V.",
volume="11",
number="3",
pages="331-342",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0013-9351",
doi="",
url="http://dx.doi.org/"
}