@article{ref1,
title="Environmental risk analysis: an overview",
journal="Risk analysis",
year="1991",
author="Singh, M. P. and Travis, C. C.",
volume="11",
number="3",
pages="377-379",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0272-4332",
doi="",
url="http://dx.doi.org/"
}