@article{ref1,
title="The separation of biplor (manic-depressive) from unipolar recurrent depressive psychoses",
journal="Behavioral neuropsychiatry",
year="1969",
author="Perris, C.",
volume="1",
number="8",
pages="17-24",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0005-7932",
doi="",
url="http://dx.doi.org/"
}