@article{ref1,
title="Maintenance treatment in bipolar disorder: Valproic acid, lithium, or both?",
journal="Tijdschrift voor Psychiatrie",
year="2010",
author="Veerman, S.R.T. and Schulte, P.F.J.",
volume="52",
number="9",
pages="673-674",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0303-7339",
doi="",
url="http://dx.doi.org/"
}