@article{ref1,
title="Physiological barriers in modern aviation",
journal="Schweizerische Medizinische Wochenschrift",
year="1955",
author="Schubert, G.",
volume="85",
number="17",
pages="400-402",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0036-7672",
doi="",
url="http://dx.doi.org/"
}