%0 Journal Article %A Bakker, Lennard F. %T Structure of group invariants of a quasiperiodic flow %J Electronic Journal of Differential Equations %D 2004 %V 2004 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a166/ %G en %F EJDE_2004__2004__a166