@article{ref1,
title="Accidental swallowing of orthodontic expansion appliance keys: report of two cases",
journal="ASDC journal of dentistry for children",
year="1983",
author="Nazif, M. M. and Ready, M. A.",
volume="50",
number="2",
pages="126-127",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1945-1954",
doi="",
url="http://dx.doi.org/"
}