1. A. Fathi, F. Laudenbach, V. Poenaru, et al., Travaux de Thurston sur les surfaces, Asterisque, (1979), 66–67.
2. P.R. Garabedian, M. Schiffer, The local maximum theorem for the coefficients of univalent functions, Arch. Rational Mech. Anal., 26 (1967), 1–32.
3. J. Hummel, B. Pinchuck, Variations for bounded nonvanishing univalent functions, J. Analyse Math., 44 (1984/85), 183–199.
4. J. Hummel, B. Pinchuk, A minimal distance problem in conformal mapping, Complex Variables, 9 (1987), 211–220.
5. J. Krzyż, An extremal length problem and its applications, Proc. of the NRL Conference on Classical Function Theory (1970), Math. Research Center, Naval Research Laboratory, Washington D.C., 143–155.