@article{ref1,
title="Escape from aircraft by downward ejection",
journal="Journal of aviation medicine",
year="1953",
author="Rothwell, W. S. and Sperry, E. G.",
volume="24",
number="4",
pages="322-327",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}