1. G. H. Hardy and J. E. Littlewood, “Contribution to the arithmetic theory of series,” Proc. London Math., 11, No. 2, 411–478 (1912).
2. E. Landau, “Einige Ungleichungen fur zweimal differenzierbare Functionen,” Proc. London Math.. 13, 43–9 (1913).
3. J. Hadamard, “Sur le module maximum d’une fonction et de ses derivees,” C R. Soc. Math. France. 41, 68–72 (1914).
4. A. N. Kolmogorov, Selected Works. Mathematics. Mechanics [in Russian] Nauka, Moscow 1985.
5. Yu. G. Bosse G. E. Shilov, “On inequalities for derivatives,” in: Collection of Works of Student Scientific Societies of MoscowUniversity [in Russian], Moscow University, Moscow (1937), pp. 17–27.