@article{ref1,
title="Trends in serious head injuries among cyclists in England: analysis of routinely collected data",
journal="British medical journal: BMJ",
year="2000",
author="Sheikh, A. and Cook, Angus",
volume="321",
number="7268",
pages="1055-1055",
abstract="Abstract unavailable.",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}