@article{ref1,
title="Closed head injury in twins. Neurologic, psychometric, and psychiatric follow-up study of consecutive cases, using co-twins as controls",
journal="Archives of general psychiatry",
year="1960",
author="Dencker, S. J.",
volume="2",
number="",
pages="569-575",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-990X",
doi="",
url="http://dx.doi.org/"
}