@article{ref1,
title="Biochemical aspects of depression",
journal="International psychiatry clinics",
year="1969",
author="Coppen, A. J.",
volume="6",
number="2",
pages="53-81",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0020-8426",
doi="",
url="http://dx.doi.org/"
}