1. Breiman, L.: The Poisson tendency in traffic distribution. Ann. Math. Statist. 34, 308?311 (1963)
2. Davidson, R.: Stochastic processes of flats and exchangeability. In [6], pp. 13?45. (Reprinted from part of Ph.D. thesis, Cambridge 1968)
3. Davidson, R.: Construction of line processes:second order properties. In[6], pp. 55?75. (Reprinted from Izv. Akad. Nauk Armjan. SSR Ser. Mat. 5, 219?234 (1970))
4. Dunford, N., Schwartz, J.T.: Linear Operators I. New York-London: Interscience 1958
5. Halmos, P.R.: Lectures on Ergodic Theory. New York: Chelsea Publishing Company 1956