@article{ref1,
title="Observations on the physical effects of flying. 1917",
journal="Aviation, space, and environmental medicine",
year="1989",
author="Schurmeier, H. L.",
volume="60",
number="2",
pages="180-182",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-6562",
doi="",
url="http://dx.doi.org/"
}