@article{ref1,
title="Objective job difficulty, behavioural response, and sector characteristics in air route traffic control centres",
journal="Ergonomics",
year="1978",
author="Hurst, M. W. and Rose, R. M.",
volume="21",
number="9",
pages="697-708",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}