@article{GDZPPN002487624, title = {Bounded Turning and Quasiconformal Maps.}, journal = {Monatshefte f\"ur Mathematik}, volume = {112}, year = {1991}, pages = {233-244}, zbl = {0736.30016}, url = {http://dml.mathdoc.fr/item/GDZPPN002487624} }
Väisälä, Jussi. Bounded Turning and Quasiconformal Maps.. Monatshefte für Mathematik, Tome 112 (1991) pp. 233-244. http://gdmltest.u-ga.fr/item/GDZPPN002487624/