@article{ref1,
title="Straightening Out the Grounds for Precaution: A Commentary and Some Suggestions About Terje Aven's "On Different Types of Uncertainties"",
journal="Risk analysis",
year="2011",
author="Vlek, Charles",
volume="31",
number="10",
pages="1534-1537",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0272-4332",
doi="10.1111/j.1539-6924.2011.01708.x",
url="http://dx.doi.org/10.1111/j.1539-6924.2011.01708.x"
}