Burkholder integrals, Morrey's problem and quasiconformal mappings

Kari Astala, Tadeusz Iwaniec, István Prause, Eero Saksman

Journal: J. Amer. Math. Soc. 25 (2012), 507–531

URL: http://dx.doi.org/10.1090/S0894-0347-2011-00718-2