@article{ref1,
title="On The Comparative Mortality Of European Capitals",
journal="British medical journal: BMJ",
year="1868",
author="",
volume="1",
number="375",
pages="227-227",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}