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Dedicated to the memory of Professor Z. Nehari
This research was supported in part by the U.S. National Science Foundation, Grant MCS-77-02842.
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Beardon, A.F., Gehring, F.W. Schwarzian derivatives, the Poincaré metric and the kernel function. Commentarii Mathematici Helvetici 55, 50–64 (1980). https://doi.org/10.1007/BF02566674
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DOI: https://doi.org/10.1007/BF02566674