@article{ref1,
title="Melatonin and jet lag",
journal="British journal of sports medicine",
year="1998",
author="Waterhouse, J. and Reilly, T. and Atkinson, G.",
volume="32",
number="2",
pages="98-99",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0306-3674",
doi="",
url="http://dx.doi.org/"
}