@article{ref1,
title="Mortality of shift and day workers 1956-68",
journal="British journal of industrial medicine",
year="1972",
author="Taylor, Pamela J. and Pocock, S. J.",
volume="29",
number="2",
pages="201-207",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1072",
doi="",
url="http://dx.doi.org/"
}