@article{ref1,
title="Episodes of unconsciousness in pilots during flight in 1956",
journal="Journal of aviation medicine",
year="1957",
author="Powell, T. J. and Carey, T. M. and Brent, H. P. and Taylor, W. J.",
volume="28",
number="4",
pages="374-386",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}