@article{ref1,
title="Make helmet use mandatory for all bicyclists, CMA recommends",
journal="CMAJ : Canadian Medical Association journal",
year="1992",
author="Sullivan, Patrick",
volume="147",
number="7",
pages="1058-1060",
abstract="Abstract unavailable.",
language="",
issn="0820-3946",
doi="",
url="http://dx.doi.org/"
}