%0 Journal Article %A Rafael Ortega %A Francisco R. Ruiz del Portal %T Attractors with vanishing rotation number %J Journal of the European Mathematical Society %D 2011 %P 1569-1590 %V 13 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/288/ %R 10.4171/jems/288 %F JEMS_2011_13_6_a1