@article{ref1,
title="Aircraft noise and birth weight",
journal="International archives of occupational and environmental health",
year="1981",
author="Knipschild, P. and Meijer, H. and Sallé, H.",
volume="48",
number="2",
pages="131-136",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0340-0131",
doi="",
url="http://dx.doi.org/"
}