@article{ref1,
title="A device for the measuring of tracking performances",
journal="American journal of psychology",
year="1964",
author="Mortimer, R. G. and Russell, R. E. and Tiffin, J.",
volume="77",
number="",
pages="123-126",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0002-9556",
doi="",
url="http://dx.doi.org/"
}