@article{ref1,
title="Notes on the causes of accidents",
journal="British medical bulletin",
year="1950",
author="Whitfield, J. W.",
volume="7",
number="1-2",
pages="73-75",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0007-1420",
doi="",
url="http://dx.doi.org/"
}