@article{ref1,
title="A contribution to the problem of heart size in boxers",
journal="Medizinische Welt",
year="1960",
author="Hornof, Z.",
volume="31",
number="",
pages="1564-1566",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0025-8512",
doi="",
url="http://dx.doi.org/"
}