@article{ref1,
title="Perceptual objects and the cost of filtering",
journal="Perception and psychophysics",
year="1983",
author="Treisman, A. and Kahneman, Daniel and Burkell, J.",
volume="33",
number="6",
pages="527-532",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5117",
doi="10.3758/BF03202934",
url="http://dx.doi.org/10.3758/BF03202934"
}