@article{ref1,
title="Prehension and the sign of the thumb in paralysis of the ulnar nerve",
journal="Bulletin of the Hospital for Joint Diseases (1940)",
year="1972",
author="Froment, J.",
volume="33",
number="2",
pages="193-196",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-5647",
doi="",
url="http://dx.doi.org/"
}