@article{ref1,
title="The relative effects of multiple factors on target acquisition",
journal="Human factors",
year="1979",
author="Whitehurst, H. O. and Grossman, J. D.",
volume="21",
number="4",
pages="423-432",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}