@article{ref1,
title="Aggressive behavior of dogs towards their keeper",
journal="Archiv für Kriminologie",
year="1973",
author="Brettel, H. F. and Luff, K.",
volume="151",
number="1-2",
pages="49-51",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0003-9225",
doi="",
url="http://dx.doi.org/"
}