@article{ref1,
title="A further attempt to cross-validate the Booth Scale of competitive behavior",
journal="Journal of the Association for Physical and Mental Rehabilitation",
year="1966",
author="Kröll, W.",
volume="20",
number="1",
pages="18-20",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-8448",
doi="",
url="http://dx.doi.org/"
}