@article{ref1,
title="The review of traffic safety researches",
journal="Shinrigaku Kenkyu",
year="1986",
author="Nakajima, M.",
volume="57",
number="2",
pages="100-114",
abstract="The traffic system has a multi-layered hierarchical structure. Traffic accidents are a phenomena on the man-machine system located at the middle level of the hierarchy. Focusing on this holon (man-machine system), safety problems are reviewed in relation with the upper and lower systems interacting with this holon.",
language="",
issn="0021-5236",
doi="",
url="http://dx.doi.org/"
}