1. A Treatise on Trigonometric Series, vols. I, II;Bary,1964
2. A product theorem for Hilbert transform;Bedrosian;Proc. IEEE,1963
3. Fourier Analysis and Approximation, vol. 1;Butzer,1971
4. Almost Periodic Oscillations and Waves;Corduneanu,2009
5. Real Analysis;Folland,1984