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@article{MAN_1988__282_2_164471, author = {O. Martio and J. V\"ais\"al\"a}, title = {Elliptic {Equations} and {Maps} of {Bounded} {Length} {Disortion.}}, journal = {Mathematische Annalen}, pages = {423--444}, publisher = {mathdoc}, volume = {282}, number = {2}, year = {1988}, zbl = {0632.35021}, url = {http://geodesic.mathdoc.fr/item/MAN_1988__282_2_164471/} }
O. Martio; J. Väisälä. Elliptic Equations and Maps of Bounded Length Disortion.. Mathematische Annalen, Tome 282 (1988) no. 2, pp. 423-444. http://geodesic.mathdoc.fr/item/MAN_1988__282_2_164471/