@article{ref1,
title="Accidental swallowing of a pin wrench. Report of a case",
journal="Annals of dentistry",
year="1978",
author="Barkmeier, W. W. and Abrams, H. and Barringer, P. S.",
volume="37",
number="4",
pages="92-94",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4770",
doi="",
url="http://dx.doi.org/"
}