@article{ref1,
title="Head-coupled display visual design considerations",
journal="Aviation, space, and environmental medicine",
year="1975",
author="Chisum, G. T.",
volume="46",
number="11",
pages="1373-1377",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-6562",
doi="",
url="http://dx.doi.org/"
}