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Chuaqui, M., Osgood, B. Ahlfors-Weill extensions of conformal mappings and critical points of the Poincaré metric. Commentarii Mathematici Helvetici 69, 659–668 (1994). https://doi.org/10.1007/BF02564508
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DOI: https://doi.org/10.1007/BF02564508