@article{ref1,
title="Football players wear helmets",
journal="WMJ (Wisconsin medical journal)",
year="1983",
author="Falk, V. S.",
volume="82",
number="9",
pages="6-6",
abstract="unavailable.  Keywords: American football",
language="en",
issn="1098-1861",
doi="",
url="http://dx.doi.org/"
}