@article{ref1,
title="Large foreign body in the esophagus",
journal="Vestnik Otorinolaringologii",
year="1988",
author="Protasevich, G. S. and Dovgan', B. N.",
volume="",
number="4",
pages="74-76",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0042-4668",
doi="",
url="http://dx.doi.org/"
}