@article{AFM_2009_34_2_a18,
     author = {Kari Astala and Jarmo J\"a\"askel\"ainen},
     title = {Homeomorphic solutions to reduced {Beltrami} equations},
     journal = {Annales Fennici Mathematici},
     pages = {607--613},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2009_34_2_a18/}
}