@article{ref1,
title="Sources of friction",
journal="AeroSafety world",
year="2012",
author="Cross, Jamie",
volume="7",
number="online",
pages="32-35",
abstract="Pilot survey explores safety-related communication with flight attendants.<p />",
language="",
issn="1934-4015",
doi="",
url="http://dx.doi.org/"
}