1. An Exploratory Comparison of the Advantages of Cars and Buses for Travel in Urban Areas;R. J. Smeed,1964
2. The Road Capacity of City Centers;R. J. Smeed,1967
3. Traffic Performance Evaluation of Road Networks by the α-Relationship;Y. Zahavi,1972
4. The Mechanism of a Road Network;J. W. Godfrey,1969
5. A Two-Fluid Approach to Town Traffic;R. Herman,1979