1. Bourgain J. [1990] Problems of almost everywhere convergence related to harmonic analysis and number theory, Israël J. Math., 71, p. 97–127.
2. Breiman L. [1992]. Probability, SIAM Ed.
3. Hardy G.H., Wright E.M. [1979] An introduction to the theory of numbers, Oxford at the Clarendon Press, Fifth ed.
4. Gál I.S., Koksma J.F. [1950] Sur l’ordre de grandeur des fonctions sommables, Indag. Math. 12 p.192–207.
5. Marczinkiewicz J., Salem R. [1940] Sur les sommes riemanniennes, Comp. Math., 7, p. 376–389.