@article{ref1,
title="Clinical problems in aviation medicine. Fatigue-studies on overseas flights",
journal="Aerospace medicine",
year="1965",
author="Bruener, H. and Klein, K. E. and Ruff, S. and Wegmann, H. M.",
volume="36",
number="",
pages="552-553",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}