@article{ref1,
title="Mean heart rate predicted by task demand characteristics",
journal="Psychophysiology",
year="1970",
author="Dahl, H. and Spence, D. P.",
volume="7",
number="3",
pages="369-376",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0048-5772",
doi="",
url="http://dx.doi.org/"
}