@article{ref1,
title="Motorcycle deaths and injuries in Texas: helmets make a difference",
journal="Texas medicine",
year="1987",
author="Lloyd, L. E. and Lauderdale, M. and Betz, T. G.",
volume="83",
number="4",
pages="30-33",
abstract="Abstract unavailable.",
language="",
issn="0040-4470",
doi="",
url="http://dx.doi.org/"
}