1. Integrability theorems for Fourier series;Askey;Duke Math. J.,1966
2. Remarks on the convergence (boundedness) in the mean of partial sums of a trigonometric series;Belov;Mat. Zametki,2002
3. Regular Variation;Bingham,1987
4. Integrability Theorems for Trigonometric Transforms;Boas,1967
5. Quasi-positive sequences and trigonometric series;Boas;Proc. London Math. Soc. (3),1965