@article{ref1,
title="Control system lags and man-machine system performance. Nasa cr-83",
journal="NASA contractor report. NASA CR.",
year="1964",
author="Muckler, F. A. and OBERMAYER, R. W.",
volume="",
number="",
pages="1-31",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0565-7059",
doi="",
url="http://dx.doi.org/"
}