@article{ref1,
title="The symptons of depression",
journal="Comprehensive therapy",
year="1976",
author="Lewinsohn, P. M. and Youngren, M. A.",
volume="2",
number="8",
pages="62-69",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-8243",
doi="",
url="http://dx.doi.org/"
}