@article{ref1,
title="Time analyses of the tasks of approach controllers in ATC",
journal="Ergonomics",
year="1971",
author="Soede, M. and Coeterier, J. F.",
volume="14",
number="5",
pages="591-601",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}