@article{ref1,
title="Sleep and activity patterns at South Pole station. A preliminary report",
journal="Archives of general psychiatry",
year="1970",
author="Shurley, J. T. and Pierce, C. M. and Natani, K. and Brooks, R. E.",
volume="22",
number="5",
pages="385-389",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-990X",
doi="",
url="http://dx.doi.org/"
}