@article{ref1,
title="Pupil size as a measure of arousal during information processing",
journal="Nature",
year="1967",
author="Bradshaw, J.",
volume="216",
number="5114",
pages="515-516",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="",
url="http://dx.doi.org/"
}