@article{ref1,
title="A comparison of state-specific all-terrain vehicle-related death rates, 1990-1999",
journal="American journal of public health",
year="2001",
author="Helmkamp, James C.",
volume="91",
number="11",
pages="1792-1795",
abstract="Abstract unavailable",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}