@article{ref1,
title="Safety requirements in aviation medicine",
journal="Nordisk Medicin",
year="1969",
author="Lundberg, U. and Strömblad, B. C.",
volume="81",
number="12",
pages="370-372",
abstract="<p>[Abstract unavailable]</p><p>Language: da</p>",
language="da",
issn="0029-1420",
doi="",
url="http://dx.doi.org/"
}