1. G. M. Goluzin, Geometric Theory of Functions of a Complex Variable [in Russian], Nauka, Moscow (1966).
2. N. A. Lebedev, The Principle of Areas in the Theory of Univalent Functions [in Russian], Nauka, Moscow (1975).
3. I. M. Milin, Univalent Functions and Orthonormalized Systems [in Russian], Nauka, Moscow (1971).
4. I. A. Aleksandrov, Parametric Continuations in the Theory of Univalent Functions [in Russian], Nauka, Moscow (1976).
5. A. C. Schaeffer and D. C. Spenser, ?The coefficients of schlicht functions,? Duke Math. J.,10, 611?635 (1943).