@article{ref1,
title="Physiological limits of locomotive drivers on successive night shifts in the People's Republic of China",
journal="Journal of human ergology",
year="1982",
author="Xia, W. S. and Song, Z. Z. and Li, N. Y.",
volume="11",
number="Suppl",
pages="393-398",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0300-8134",
doi="",
url="http://dx.doi.org/"
}