@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/