@article{ref1,
title="Man and his self-made artificial environment. The disturbed ecological equilibrium in cities",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1974",
author="Bakács, T.",
volume="20",
number="12",
pages="833-842",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}