@article{ref1,
title="Grey mood: grey colours",
journal="Lancet",
year="1989",
author="De Leo, Diego and Rocco, P. L. and Dello Buono, M. R. and Dalla Barba, G. F.",
volume="2",
number="8662",
pages="573-574",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0140-6736",
doi="",
url="http://dx.doi.org/"
}