@article{ref1,
title="Hazards at sea",
journal="Accident analysis and prevention",
year="1974",
author="Mayer, HE",
volume="6",
number="1",
pages="83-84",
abstract="When the traffic doubles in the intersection of two sea lanes, the risk of collision between ships increases by a factor of 8. This result, reported earlier by Dr. Arne Jensen, is confirmed by an alternative approach.<p />",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}