@article{ref1,
title="Noise-induced nocturnal cortisol secretion and tolerable aircraft flights",
journal="Schriftenreihe des Vereins für Wasser-, Boden- und Lufthygiene",
year="2001",
author="Spreng, M.",
volume="",
number="111",
pages="75-90",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0300-8665",
doi="",
url="http://dx.doi.org/"
}