@article{ref1,
title="Care for patients in extreme old age by the internist in clinical practice",
journal="Internist",
year="2000",
author="Lucke, C. and Krause, D. and Lüttje, D.",
volume="41",
number="6",
pages="563-572",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0020-9554",
doi="",
url="http://dx.doi.org/"
}