@article{ASNSP_2002_5_1_3_687_0,
     author = {Astala, Kari and Bonk, Mario and Heinonen, Juha},
     title = {Quasiconformal mappings with {Sobolev} boundary values},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {687--731},
     publisher = {Scuola normale superiore},
     volume = {Ser. 5, 1},
     number = {3},
     year = {2002},
     mrnumber = {1990676},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_2002_5_1_3_687_0/}
}