@article{ref1,
title="Pediatric coin ingestion",
journal="American journal of diseases of children (1960)",
year="1990",
author="Foster, D. L.",
volume="144",
number="4",
pages="450-452",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-922X",
doi="",
url="http://dx.doi.org/"
}