1. I. Berkes, On the convergence of ∑ncnf(nx) and the Lip 1/2 class, Trans. Amer. Math. Soc. 349 (10) 4143–4158.
2. On the convergence of ∑ckf(nkx);Berkes;Memoirs of the A.M.S.,2009
3. On convergence and growth of partial sums of Fourier series;Carleson;Acta Math.,1966
4. On convergence and divergence systems;Gaposhkin;Mat. Zametki,1968
5. An Introduction to the Theory of Numbers;Hardy,1979