@article{GDZPPN002326698,
title = {Rotation Numbers of Products of Circle Homeomorphisms.},
journal = {Mathematische Annalen},
volume = {270},
year = {1985},
pages = {381-400},
zbl = {0543.57019},
url = {http://dml.mathdoc.fr/item/GDZPPN002326698}
}
Neumann, Walter D.; Jankins, Mark. Rotation Numbers of Products of Circle Homeomorphisms.. Mathematische Annalen, Tome 270 (1985) pp. 381-400. http://gdmltest.u-ga.fr/item/GDZPPN002326698/