@article{ref1,
title="Danger to heart and circulation by improper sport practice",
journal="Wiener Klinische Wochenschrift",
year="1983",
author="Raas, E. and Hörtnagl, H.",
volume="95",
number="5",
pages="133-137",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0043-5325",
doi="",
url="http://dx.doi.org/"
}