@article{ref1,
title="Study of suicide in Philadelphia",
journal="Public health reports (1896)",
year="1958",
author="Lavell, M. and Tuckman, J.",
volume="73",
number="6",
pages="547-553",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0094-6214",
doi="",
url="http://dx.doi.org/"
}