@article{ref1,
title="Work and age: statistical considerations",
journal="British medical journal: BMJ",
year="1953",
author="Logan, W. P. D.",
volume="2",
number="4847",
pages="1190-1193",
abstract="KEYWORDS: SuicideFull text:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2030157/pdf/brmedj03418-0028.pdf<p />",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}