@article{ref1,
title="Influences of training and fatigue on the continuous recording of a visual differential threshold",
journal="British journal of psychology (1953)",
year="1961",
author="Haider, M. and Dixon, N. F.",
volume="52",
number="",
pages="227-237",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1269",
doi="",
url="http://dx.doi.org/"
}