@article{ref1,
title="An investigation of the effectiveness of a new helmet to control touch football head injuries",
journal="American journal of public health",
year="1970",
author="Kraus, Jess Frank and Anderson, Bruce D. and Mueller, C. E.",
volume="60",
number="5",
pages="903-912",
abstract="Abstract unavailable.",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}