@article{ref1,
title="Has the time come for protective headgear for soccer?",
journal="Clinical journal of sport medicine",
year="1999",
author="Drummond, R. and Delaney, J. Scott",
volume="9",
number="3",
pages="121-123",
abstract="Abstract unavailable.",
language="",
issn="1050-642X",
doi="",
url="http://dx.doi.org/"
}