@article{ref1,
title="Characteristics of fatal rollover crashes (NHTSA notes)",
journal="Annals of emergency medicine",
year="2003",
author="National Highway Traffic Safety Administration, USA,  and Morris, Lee M.",
volume="41",
number="2",
pages="271-272",
abstract="Abstract unavailable.",
language="",
issn="0196-0644",
doi="10.1067/mem.2003.55",
url="http://dx.doi.org/10.1067/mem.2003.55"
}