@article{AIHPC_2010__27_1_1_0,
     author = {Astala, Kari and Gill, James T. and Rohde, Steffen and Saksman, Eero},
     title = {Optimal regularity for planar mappings of finite distortion},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1--19},
     publisher = {Elsevier},
     volume = {27},
     number = {1},
     year = {2010},
     doi = {10.1016/j.anihpc.2009.01.012},
     zbl = {1191.30007},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2009.01.012/}
}