@article{GDZPPN002057972, title = {On a characterization of quasiconformal mappings.}, journal = {Commentarii mathematici Helvetici}, volume = {37}, year = {1962}, pages = {44-48}, zbl = {0108.07701}, url = {http://dml.mathdoc.fr/item/GDZPPN002057972} }
Reich, Edgar. On a characterization of quasiconformal mappings.. Commentarii mathematici Helvetici, Tome 37 (1962) pp. 44-48. http://gdmltest.u-ga.fr/item/GDZPPN002057972/