@article{ref1,
title="A critical review on different types of accident morbidity studies",
journal="Courrier",
year="1957",
author="Berfenstam, Ragnar",
volume="7",
number="7",
pages="349-361",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0538-5482",
doi="",
url="http://dx.doi.org/"
}