@article{ref1,
title="Effects of aircraft noise on human sleep",
journal="American Industrial Hygiene Association journal",
year="1972",
author="Lukas, J. S.",
volume="33",
number="5",
pages="298-303",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8894",
doi="",
url="http://dx.doi.org/"
}