@article{ref1,
title="Iceland's volcano adds new urgency to Europe's Single Sky",
journal="European transport policy",
year="2010",
author="",
volume="7",
number="15",
pages="5-6",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1745-9850",
doi="",
url="http://dx.doi.org/"
}