@article{ref1,
title="ABC of mental health. Mental health in old age",
journal="British medical journal: BMJ",
year="1997",
author="MacDonald, A. J.",
volume="315",
number="7105",
pages="413-417",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}