1. Adams, W. F., Road Traffic Considered as a Random Series, J. Inst. Civil. Engrs. London, 4 (1936), 121 - 130.
2. Frechet, N., Recherches Theoriques Modernes Sur Les Calcul des Probabilities, Second Livre, Gauthier-Villars, Paris, 1938.
3. Garwood, F., The Application of the Theory of Probability to the Operation of Vehicular Controlled Traffic Signals, J. Roy. Statist. Soc. Suppl., 7 (1940), 65 - 77.
4. Gaver, D. P., Accommodation of Second Class Traffic, Technical Re-port No. 74, Applied Math, and Stat. Lab., Stanford University, California.
5. Haight, F. A., Mathematical Theories of Traffic Flow, Mathematics in Science and Eng., Vol. 7, Academic Press, New York, 1963.