@article{ref1,
title="Suicide, homicide, and age dependency ratios",
journal="International journal of aging and human development",
year="1973",
author="Lester, David",
volume="4",
number="2",
pages="127-132",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0091-4150",
doi="",
url="http://dx.doi.org/"
}