@article{GDZPPN002068303,
title = {Rotation sets and monotone periodic orbits for annulus homeomorphisms.},
journal = {Commentarii mathematici Helvetici},
volume = {67},
year = {1992},
pages = {203-213},
zbl = {0763.58012},
url = {http://dml.mathdoc.fr/item/GDZPPN002068303}
}
Boyland, Philip. Rotation sets and monotone periodic orbits for annulus homeomorphisms.. Commentarii mathematici Helvetici, Tome 67 (1992) pp. 203-213. http://gdmltest.u-ga.fr/item/GDZPPN002068303/