@article{ref1,
title="Little League baseball and head injury",
journal="Pediatrics",
year="1992",
author="Hart, E. J.",
volume="89",
number="3",
pages="520-521",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4005",
doi="",
url="http://dx.doi.org/"
}