@article{ref1,
title="Bicycle safety",
journal="American journal of diseases of children (1960)",
year="1987",
author="Allen, C. E. and Borland, S. W.",
volume="141",
number="2",
pages="136-137",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0002-922X",
doi="",
url="http://dx.doi.org/"
}