@article{ref1,
title="Summation of conflict states",
journal="Perceptual and motor skills",
year="1960",
author="Greenfeld, Norman",
volume="11",
number="2",
pages="103-110",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1960.11.2.103",
url="http://dx.doi.org/10.2466/pms.1960.11.2.103"
}