@article{ref1,
title="Collision with spring-loaded football tackling and blocking dummies. Report of near-fatal and fatal injuries",
journal="JAMA journal of the American Medical Association",
year="1976",
author="Torg, J. S. and Quedenfeld, T. C. and Thieler, E. R. and Lignelli, G. J.",
volume="236",
number="11",
pages="1270-1271",
abstract="<p>[Abstract unavailable]  Keywords: American football </p> <p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}