1. Y. Abu-Muhanna and Y. J. Leung,On analytic slit mapping in the class Σ, Proc. Amer. Math. Soc.97 (1986).
2. A. Chang, M. M. Schiffer and G. Schober,On the second variation for univalent functions, J. Analyse Math.40 (1981), 203–238.
3. P. R. Garabedian and M. M. Schiffer,A coefficient inequality for schlicht functions, Ann. of Math.61 (1955), 116–136.
4. J. A. Jenkins,On certain coefficients of univalent functions, inAnalytic Functions, Princeton Univ. Press, Princeton, N.J., 1960.
5. J. A. Jenkins,Univalent Functions and Conformal Mapping, Springer-Verlag, Berlin, 1965.