1. Dye H.A. Geometrie contemporaine. Méthodes et Applications. Mir, Moscow, 1982, p. 371.
2. Fomenko A.T. — see Doubrovine B. Fomin S.V. (see also Kolmogorov A.W., Naimark M.A.) To the theory of dynamical systems with continuous spectrum. —Doklady Akademii Nauk, 1949, v. 67, p. 435–437 (in Russian).
3. Grenander U. Stochastic processes and statistical inference. — Arkiv for Matematik., 1950, v. 1, No.17, p.195–277.
4. Blum J.R., Eisenberg B. Conditions for metric transitivity for stationary Gaussian processes on groups. — The Ann. of Math. Statistics, 1972, v. 43, No. 5, p. 1737–1741.
5. Blum J.R., Eisenberg B., Hahn L.—S. Ergodic theory and the measure of sets in the Bohr group. — Acta Scientiarum Mathem., 1973, v. 34, p. 17–24.