@article{ref1,
title="A follow-up study of 128 closed head injuries in twins using co-twins as controls",
journal="Acta psychiatrica et neurologica Scandinavica, Supplementum",
year="1958",
author="Dencker, S. J.",
volume="123",
number="",
pages="1-125",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0365-5067",
doi="",
url="http://dx.doi.org/"
}