@article{ref1,
title="Polytrauma in the elderly",
journal="World journal of surgery",
year="1986",
author="Marx, A. B. and Campbell, Ruth and Harder, F.",
volume="10",
number="2",
pages="330-335",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0364-2313",
doi="",
url="http://dx.doi.org/"
}