@article{ref1,
title="Delayed air embolism",
journal="American educational research journal",
year="1973",
author="Johnson, H. R.",
volume="2",
number="3",
pages="375-377",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8312",
doi="",
url="http://dx.doi.org/"
}