1. B. C. Arnold, Pareto Distributions, 2th edition, CRC Press (Boca Raton, 2015).
2. V. I. Bogachev, Measure Theory, Vol. II, Springer-Verlag (Berlin, 2007).
3. G. B. Folland, Real Analysis: Modern Techniques and their Applications, 2th edition, Wiley–Interscience Publication, John Wiley & Sons, Inc. (New York, 1999).
4. E. Hewitt and K. A. Ross, Abstract Harmonic Analysis, Vol. II, Springer-Verlag (New York–Berlin, 1997).
5. Ilinskii A. I.: On the zeros and the argument of a characteristic function. Theory Probab. Appl., 20, 410–415 (1975)