@article{ref1,
title="The adaptation of night nurses to different work schedules",
journal="Ergonomics",
year="1987",
author="Verhaegen, P. and Cober, R. and De Smedt, M. and Dirkx, J. and Kerstens, J. and Ryvers, D. and Van Daele, P.",
volume="30",
number="9",
pages="1301-1309",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}