@article{ref1,
title="Multi-vehicle collision on I-90 Hampshire - Arengo toll plaza near Hampshire, Illinois [U.S.A.]",
journal="Accident investigation quarterly",
year="2007",
author="National Transportation Safety Board, ",
volume="2007",
number="45",
pages="26-41",
abstract="Abstract unavailable.",
language="",
issn="1082-6521",
doi="",
url="http://dx.doi.org/"
}