@article{ref1,
title="The prevention of head injuries",
journal="Postgraduate medical journal",
year="1963",
author="Lewin, W.",
volume="39",
number="",
pages="705-708",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0032-5473",
doi="",
url="http://dx.doi.org/"
}