@article{ref1,
title="Foreign bodies of the esophagus",
journal="Ugeskrift for Laeger",
year="1977",
author="Pedersen, C. B.",
volume="139",
number="3",
pages="144-147",
abstract="<p>[Abstract unavailable]</p><p>Language: da</p>",
language="da",
issn="0041-5782",
doi="",
url="http://dx.doi.org/"
}