@article{ref1,
title="The measurement of pessimism: The Hopelessness Scale",
journal="Journal of consulting and clinical psychology",
year="1974",
author="Trexler, L. and Lester, David and Weissman, A. and Beck, Aaron T.",
volume="42",
number="6",
pages="861-865",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-006X",
doi="",
url="http://dx.doi.org/"
}