@article{ref1,
title="The documentor: U.S. study shows bicycle helmets effective",
journal="Australian family physician",
year="1989",
author="",
volume="18",
number="11",
pages="1327-1327",
abstract="Abstract unavailable.  <p>Language: en</p>",
language="en",
issn="0300-8495",
doi="",
url="http://dx.doi.org/"
}