@article{ref1,
title="Steady state noise and music and vigilance",
journal="Ergonomics",
year="1977",
author="Hartley, Laurence R. and Williams, T.",
volume="20",
number="3",
pages="277-285",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}