1. G. M. Goluzin, ?Some questions in the theory of univalent functions,? Tr. Mat. Inst. im. V. A. Steklova Akad. Nauk SSSR,27, 1?109 (1949).
2. G. M. Goluzin, Geometric Theory of Functions of a Complex Variable [in Russian], Nauka, Moscow (1966).
3. H. Prawitz, ?Über Mittelwerte analytischer Funktionen,? Arkiv Mat., Astronomy, Physik,20A, No. 6, 1?12 (1927?1928).
4. S. A. Gel'fer, ?On a class of regular functions not taking any pair of values w and w,? Mat. Sb.,19(61), No. 1, 33?46 (1946).
5. T. H. MacGregor, ?Rotations of the range of an analytic function,? Math. Ann.,201, No. 2, 113?126 (1973).