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@article{MZ_1990__205_3_174161, author = {J\"urgen Moser}, title = {On commuting circle mappings and simultaneous {Diophantine} approximations.}, journal = {Mathematische Zeitschrift}, pages = {105--122}, publisher = {mathdoc}, volume = {205}, number = {3}, year = {1990}, zbl = {0689.58031}, url = {http://geodesic.mathdoc.fr/item/MZ_1990__205_3_174161/} }
Jürgen Moser. On commuting circle mappings and simultaneous Diophantine approximations.. Mathematische Zeitschrift, Tome 205 (1990) no. 3, pp. 105-122. http://geodesic.mathdoc.fr/item/MZ_1990__205_3_174161/