TY  - JOUR
AU  - Juha Heinonen
AU  - Pekka Koskela
TI  - Definitions of quasiconformality.
JO  - Inventiones mathematicae
PY  - 1995
SP  - 61
EP  - 80
VL  - 120
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1995__120_2_144269/
ID  - IM_1995__120_2_144269
ER  -