1. A.N. Kolmogorov, Basic notions of probability theory, ONTI, Moscow-Leningrad, 1936 (in Russian).
2. P. Halmos, Measure theory, Van Nostrand, Princeton, N.J., 1950.
3. B.V. Gnedenko and A.N. Kolmogorov, Limit distributions for sums of independent random variables, GTTI, Moscow, 1949 (in Russian).
4. A. Kolmogoroff, ‘Algèbres de Boole métriques complètes’, In: VI Zjazd Matematykow Polskich Warszawa, 1948, pp. 22–30.
5. N. Wiener, Publ. Mass. Inst Techn., 2 (1923), 60.