@article{ref1,
title="Intestinal obstruction caused by foreign bodies",
journal="American journal of proctology",
year="1960",
author="Perkel, L. L.",
volume="11",
number="",
pages="35-39",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9521",
doi="",
url="http://dx.doi.org/"
}