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2. Univalent Functions;Duren,1984
3. On the Schwarz–Christoffel transformation and p-valent functions;Goodman;Trans. Am. Math. Soc,1950
4. Some classes of regular functions;Libera;Proc. Am. Math. Soc,1965
5. On distortion theorems;Owa;I. Kynuposk Math. J.,1978