@article{AIHPC_2017__34_6_1543_0,
     author = {Astala, Kari and Clop, Albert and Faraco, Daniel and J\"a\"askel\"ainen, Jarmo and Koski, Aleksis},
     title = {Nonlinear {Beltrami} operators, {Schauder} estimates and bounds for the {Jacobian}},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1543--1559},
     publisher = {Elsevier},
     volume = {34},
     number = {6},
     year = {2017},
     doi = {10.1016/j.anihpc.2016.10.008},
     zbl = {1375.30024},
     mrnumber = {3712010},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2016.10.008/}
}