@article{
NecDeS:03-018,
author={I. Necoara and B. {D}e Schutter and J. Hellendoorn},
title={Structural properties of {Helbing's} traffic flow model},
journal={Transportation Research Record},
number={1883},
pages={21--30},
year={2004},
doi={
10.3141/1883-03}
}