Geodesic
The Ahlfors-Schwarz lemma, curvature, distance and distortion
Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 45 (2020) no. 1.

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In this paper, we consider versions of the Ahlfors-Schwarz lemma related to ultrahyperbolic metric, quasiconformal harmonic and holomorphic functions (including several dimensions versions) and harmonic mappings. Our exposition includes some recently obtained results. 
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     author = {Miodrag Mateljevi\'c},
     title = {The {Ahlfors-Schwarz} lemma, curvature, distance and distortion},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
     pages = {67 - 119},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2020},
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}
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Miodrag Mateljević. The Ahlfors-Schwarz lemma, curvature, distance and distortion. Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 45 (2020) no. 1. http://geodesic.mathdoc.fr/item/BASS_2020_45_1_a4/