@article{ref1,
title="A psychophysiological assessment of operator workload during simulated flight missions",
journal="Human factors",
year="1987",
author="Kramer, Arthur F. and Sirevaag, E. J. and Braune, Rolf",
volume="29",
number="2",
pages="145-160",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}