1. Bernstein, S.: Sur les liaisons entre les grandeurs aléatoires, Verh. des intern. Mathematikerkongr. I Zürich 1932
2. Beurling, A.: An automorphism of product measures, Ann. of Math. 72, 189?200 (1960)
3. Billingsley, P.: Convergence of Probability Measures. New York: Wiley 1968
4. Blumenthal, R.M., Getoor, R.K.: Markov Processes and Potential Theory. New York: Academic Press 1968
5. Doob, J.L.: Stochastic Processes. New York: Wiley 1953