1. Lars V. Ahlfors. On quasiconformal mappings. J. Analyse Math., 3:1–58; correction, 207–208, 1954.
2. Mario Bonk and Bruce Kleiner. Conformal dimension and Gromov hyperbolic groups with 2-sphere boundary. Geom. Topol., 9:219–246, 2005.
3. Marc Bourdon and Hervé Pajot. Cohomologie lp et espaces de Besov. J. Reine Angew. Math., 558:85–108, 2003.
4. B.V. Boyarski˘ı. Homeomorphic solutions of Beltrami systems. Dokl. Akad. Nauk SSSR (N.S.), 102:661–664, 1955.
5. Piotr Haj̷lasz. Sobolev spaces on an arbitrary metric space. Potential Anal., 5(4):403–415, 1996.