TY  - JOUR
AU  - Jürgen Moser
TI  - On commuting circle mappings and simultaneous Diophantine approximations.
JO  - Mathematische Zeitschrift
PY  - 1990
SP  - 105
EP  - 122
VL  - 205
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1990__205_3_174161/
ID  - MZ_1990__205_3_174161
ER  -