@article{ref1,
title="A psychometric study of identical twins discordant for closed head injury",
journal="Acta psychiatrica et neurologica Scandinavica, Supplementum",
year="1958",
author="Dencker, S. J. and Lofving, B.",
volume="122",
number="",
pages="1-50",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0365-5067",
doi="",
url="http://dx.doi.org/"
}