@article{ref1,
title="Exposure of the Warsaw population to traffic noise. I",
journal="Roczniki Panstwowego Zakladu Higieny",
year="1987",
author="Koszarny, Z. and Szata, W.",
volume="38",
number="1",
pages="1-9",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0035-7715",
doi="",
url="http://dx.doi.org/"
}