1. A. Zygmund, Trigonometric Series, 2 Vols. (Cambridge Univ. Press, 1959).
2. N. K. Bari, Trigonometric Series, Ed. by P. L. Ul’yanov (Gos. Izd-vo Fiz.-Mat. Lit., Moscow, 1961).
3. S. B. Stechkin, ‘‘On convergence and divergence of trigonometric series,’’ Uspekhi Mat. Nauk 42 (2), 148–149 (1951).
4. K. Zeller, ‘‘Über Konvergenzmengen von Fourierreihen,’’ Arch. Math 6, 335–340 (1955). https://doi.org/10.1007/BF01899414
5. L. V. Taikov, ‘‘On divergence of Fourier series in rearranged trigonometric system,’’ Uspekhi Mat. Nauk 113 (5), 191–198 (1963).