@article{ref1,
title="Epidemiological study of in-flight airline pilot incapacitation",
journal="Aerospace medicine",
year="1971",
author="Kulak, L. L. and Wick, R. L. and Billings, C. E.",
volume="42",
number="6",
pages="670-672",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}