@article{ref1,
title="The kick: biomechanics and collision injury",
journal="American journal of sports medicine",
year="1978",
author="Gainor, B. J. and Piotrowski, G. and Puhl, J. J. and Allen, W. C.",
volume="6",
number="4",
pages="185-193",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0363-5465",
doi="",
url="http://dx.doi.org/"
}