@article{ref1,
title="Why I have difficulty being enthusiastic about recommending that children wear helmets on bicycles",
journal="Pediatrics",
year="1987",
author="Ciastko, A. R.",
volume="79",
number="3",
pages="487-488",
abstract="Abstract unavailable.",
language="",
issn="0031-4005",
doi="",
url="http://dx.doi.org/"
}