@article{ref1,
title="Cycle helmet ownership in a birth cohort of children",
journal="New Zealand medical journal",
year="1990",
author="Lloyd, Michael and Fergusson, D. M.",
volume="103",
number="898",
pages="456-457",
abstract="Concerns bicycle helmet ownership among children.  <p>Language: en</p>",
language="en",
issn="0028-8446",
doi="",
url="http://dx.doi.org/"
}