@article{ref1,
title="Oral injury by ball point pen",
journal="Clinical proceedings - Children's Hospital of the District of Columbia",
year="1956",
author="Sackett, L. M. and Sullivan, J. J.",
volume="12",
number="1",
pages="16-18",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-4129",
doi="",
url="http://dx.doi.org/"
}