@article{GDZPPN002063956, title = {Quasiconformal circles and Lipschitz classes.}, journal = {Commentarii mathematici Helvetici}, volume = {55}, year = {1980}, pages = {485-498}, zbl = {0447.30005}, url = {http://dml.mathdoc.fr/item/GDZPPN002063956} }
Näkki, Raimo; Palka, Bruce. Quasiconformal circles and Lipschitz classes.. Commentarii mathematici Helvetici, Tome 55 (1980) pp. 485-498. http://gdmltest.u-ga.fr/item/GDZPPN002063956/