@article{ref1,
title="A study of manual control methodology with annotated bibliography. Nasa cr-125",
journal="NASA contractor report. NASA CR.",
year="1964",
author="Summers, L. G. and Ziedman, K.",
volume="",
number="",
pages="1-198",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0565-7059",
doi="",
url="http://dx.doi.org/"
}