@article{ref1,
title="Response of heart rate to a roller coaster ride",
journal="British medical journal: BMJ",
year="1989",
author="Pringle, S. D. and Macfarlane, P. W. and Cobbe, S. M.",
volume="299",
number="6715",
pages="1575-1575",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}