@article{ref1,
title="The velocity of the motion after-effect",
journal="Acta psychologica",
year="1956",
author="Johansson, G.",
volume="12",
number="",
pages="19-24",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0001-6918",
doi="",
url="http://dx.doi.org/"
}