1. The application of catastrophe theory to traffic flow variables;Acha-Daza;Transportation Research Record,1994
2. Freeway speed flow concentration relationships: more evidence and interpretations;Banks;Transportation Research Record,1989
3. Cassidy, M.J. 1996. Unique bivariate relationships in highway traffic. Preprint, No. 960100, Transportation Research Board Annual meeting, Washington DC.
4. Ceder, A. 1975. Investigation of two-regime traffic flow models at the micro- and macroscopic levels. Ph.D. dissertation, University of California, Berkeley, CA.
5. A deterministic traffic flow model for the two-regime approach. Transportation Research Record;Ceder;567,1976