@article{ref1,
title="Running and swimming world records",
journal="British journal of sports medicine",
year="1976",
author="Jokl, P. and Jokl, E.",
volume="10",
number="4",
pages="203-208",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0306-3674",
doi="",
url="http://dx.doi.org/"
}