@article{ref1,
title="Intellectual and biological bases of jujitsu",
journal="Deutsche Medizinische Wochenschrift",
year="1956",
author="Holker, E.",
volume="81",
number="7",
pages="237-240",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}