@article{ref1,
title="Biorhythms and sports",
journal="Journal of sports medicine and physical fitness",
year="1981",
author="Wright, M. L.",
volume="21",
number="1",
pages="74-80",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-4707",
doi="",
url="http://dx.doi.org/"
}