@article{ref1,
title="Several cases of fracture caused by muscular force during athletic exercise",
journal="Seikeigeka",
year="1965",
author="Yamada, H. and Kato, H.",
volume="16",
number="9",
pages="781-784",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0030-5901",
doi="",
url="http://dx.doi.org/"
}