@article{ref1,
title="Blinking as a measure of effort in visual work",
journal="American journal of psychology",
year="1950",
author="Wood, C. L. and Bitterman, M. E.",
volume="63",
number="4",
pages="584-588",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9556",
doi="",
url="http://dx.doi.org/"
}