@article{ref1,
title="Survey of head, helmet and headform sizes related to motorcycle helmet design",
journal="Ergonomics",
year="1988",
author="Gilchrist, A. and Mills, N. J. and Khan, T.",
volume="31",
number="10",
pages="1393-1412",
abstract="Abstract unavailable.",
language="",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}