@article{ref1,
title="On cause",
journal="Forum: International Society of Air Safety Investigators",
year="1991",
author="Benner, Ludwig",
volume="24",
number="3",
pages="-",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="1088-8128",
doi="",
url="http://dx.doi.org/"
}