@article{ref1,
title="Christmas vacations, winter sports and wintry weather",
journal="Deutsche Gesundheitswesen",
year="1958",
author="Bolender, E.",
volume="13",
number="18",
pages="562-564",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-0219",
doi="",
url="http://dx.doi.org/"
}