@article{ref1,
title="The natural history of attempted suicide in Bristol",
journal="British journal of medical psychology",
year="1969",
author="Roberts, Julian V. and Hooper, D.",
volume="42",
number="4",
pages="303-312",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1129",
doi="",
url="http://dx.doi.org/"
}