@article{ref1,
title="Unusual foreign body in the colon",
journal="American journal of surgery",
year="1951",
author="Israel, G. I.",
volume="82",
number="5",
pages="657-658",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9610",
doi="",
url="http://dx.doi.org/"
}