@article{ref1,
title="VII. Medical effects of aircraft noise: drug survey",
journal="International archives of occupational and environmental health",
year="1977",
author="Knipschild, P. and Oudshoorn, N.",
volume="40",
number="3",
pages="197-200",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0340-0131",
doi="",
url="http://dx.doi.org/"
}