@article{ref1,
title="Smoking and attitudes to seat belt usage",
journal="Public health",
year="1982",
author="Cliff, K. S. and Grout, P. and Machin, D.",
volume="96",
number="1",
pages="48-52",
abstract="Abstract unavailable.",
language="",
issn="0033-3506",
doi="",
url="http://dx.doi.org/"
}