1. H. Bohr, “Ein Allgemeinerung Satz über die Integration Eines Trigonometrischen Polynomials,” Prace Math. Fiz. 43, 273–288 (1935).
2. J. Favard, “Application de la Formule Sommatoire d’Euler á la Démonsration de Quclques Propertietés Extrémales des Intégrales des Fonctions Périodiques on Presque-Périodiques,” Mat. Tidskr., 81–95 (1936).
3. B. M. Levitan, “On a Generalization of Inequalities of S. N. Bernstein and H. Bohr,” Sov. Phys. Dokl. 15, 17–19 (1937).
4. A. G. Baskakov, “Representation Theory for Banach Algebras, Abelian Groups and Semigroups in the Spectral Analysis of Linear Operators,” Sovremenn. Matem. Fundament. Napravleniya 9, 3–151 (2004).
5. A. G. Baskakov, “Bernstein-Type Inequalities in Abstract Harmonic Analysis,” Sib. Matem. Zhurn. 20(5), 942–952 (1979).