@article{PM_2009_2009_1_a8,
     author = {Clop, A. and   Faraco, D. and  Mateu, J. and  Orobitg,  J. and  Zhong, X.},
     title = {Beltrami equations with coefficient in the {Sobolev} space {W1,p.}},
     journal = {Publicacions matem\`atiques},
     pages = {197-230},
     publisher = {mathdoc},
     volume = {53},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2009_2009_1_a8/}
}