@article{ref1,
title="Farm tractor rollover protection: why simply getting rollover protective structures installed on all tractors is not sufficient",
journal="Journal of agricultural safety and health",
year="2009",
author="Hoy, Roger M.",
volume="15",
number="1",
pages="3-4",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1074-7583",
doi="",
url="http://dx.doi.org/"
}