@article{ref1,
title="Eye accommodation to head-up virtual images",
journal="Human factors",
year="1988",
author="Iavecchia, J. H. and Iavecchia, H. P. and Roscoe, Stanley N.",
volume="30",
number="6",
pages="689-702",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}