@article{02239294, title = {Dirichlet's principle, distortion and related problems for harmonic mappings.}, journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie}, volume = {75(89)}, year = {2004}, pages = {147-171}, doi = {10.2298/PIM0475147M}, zbl = {1081.30022}, language = {en}, url = {http://dml.mathdoc.fr/item/02239294} }
Mateljević, Miodrag. Dirichlet's principle, distortion and related problems for harmonic mappings.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 75(89) (2004) pp. 147-171. doi : 10.2298/PIM0475147M. http://gdmltest.u-ga.fr/item/02239294/