%0 Journal Article %A Bavo Langerock %A Tom Mestdag %A Joris Vankerschaver %T Routh Reduction by Stages %J Symmetry, integrability and geometry: methods and applications %D 2011 %V 7 %U http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a108/ %G en %F SIGMA_2011_7_a108