@article{ref1,
title="Acuities for spatial arrangement in line figures: human and ideal observers compared",
journal="Vision research",
year="1973",
author="Andrews, D. P. and Butcher, A. K. and Buckley, B. R.",
volume="13",
number="3",
pages="599-620",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}