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@article{MAN_1985__271_163975, author = {Walter D. Neumann and Mark Jankins}, title = {Rotation {Numbers} of {Products} of {Circle} {Homeomorphisms.}}, journal = {Mathematische Annalen}, pages = {381--400}, publisher = {mathdoc}, volume = {271}, year = {1985}, zbl = {0543.57019}, url = {http://geodesic.mathdoc.fr/item/MAN_1985__271_163975/} }
Walter D. Neumann; Mark Jankins. Rotation Numbers of Products of Circle Homeomorphisms.. Mathematische Annalen, Tome 271 (1985), pp. 381-400. http://geodesic.mathdoc.fr/item/MAN_1985__271_163975/