1. J. L. Doob, A minimum problem in the theory of analytic functions. Duke Math. J. 8 (1941), 413–424.
2. Y. Katznelson, An introduction to harmonic analysis. Wiley, New York 1968.
3. Y. Meyer, Spectre des mesures et mesures absolument continues. Studia Math. 30 (1968), 87–99.
4. D. J. Newman, Pseudo uniform convexity in H
1. Proc. Amer. Math. Soc. 14 (1963), 676–679.
5. W. Rudin, Trigonometric series with gaps. J. Math. Mech. 9 (1960), 203–227.