@article{ref1,
title="An unusual foreign body, a marble, in the esophagus",
journal="AMA archives of otolaryngology",
year="1955",
author="Ausband, J. R. and Harrill, J. A. and Johnson, H. D.",
volume="62",
number="6",
pages="641-643",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0096-6894",
doi="",
url="http://dx.doi.org/"
}