@article{ref1,
title="Criteria for the design of helicopter collective controls",
journal="Human factors",
year="1970",
author="Stave, A. M.",
volume="12",
number="4",
pages="387-390",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}