@article{ref1,
title="Foreign bodies in the esophagus causing major medical emergencies",
journal="Tidsskrift for den Norske Laegeforening",
year="1977",
author="Pettersen, J. E. and Hysing, E. S. and Haugsten, P. A.",
volume="97",
number="7",
pages="330-333",
abstract="<p>[Abstract unavailable]</p><p>Language: no</p>",
language="no",
issn="0029-2001",
doi="",
url="http://dx.doi.org/"
}