@article{ref1,
title="Repeat injuries in an inner city population--Philadelphia, 1987-1988",
journal="MMWR: Morbidity and mortality weekly report",
year="1990",
author="Centers for Disease Control and Prevention, USA, ",
volume="39",
number="1",
pages="1-3",
abstract="Abstract unavailable.",
language="en",
issn="0149-2195",
doi="",
url="http://dx.doi.org/"
}