@article{ref1,
title="Incidence of mild and very mildtraumatic brain injuries in secondary school rugby team",
journal="African journal for physical, health education, recreation and dance",
year="2006",
author="Peters, Ellen and Strydom, GL and Dijkstra, HP and Laubscher, JA",
volume="12",
number="4",
pages="468-482",
abstract="",
language="",
issn="1117-4315",
doi="",
url="http://dx.doi.org/"
}