1. B. S. Pavlov, ?Uniqueness theorems for functions with a positive imaginary part,? in: Probl. Mat. Fiz., No. 4, Leningr. Gos. Univ., Leningr (1970), pp. 118?125.
2. H. Hutt, Some Results on Peak and Interpolation Sets of Analytic Functions with Higher Regularity, Thesis, Dept. Math., Uppsala Univ. (1976).
3. I. I. Privalov, Boundary Properties of Analytic Functions [in Russian], GITTL, Moscow-Leningrad (1950).
4. A. Zygmund, Trigonometric Series, Cambridge University Press, Cambridge (1959).
5. S. V. Hru??ev, ?Sets of uniqueness for the Gevrey classes,? Ark. Mat.,15, No. 2, 256?304 (1977).