%0 Journal Article %A Andrew James Bruce %A Katarzyna Grabowska %A Janusz Grabowski %T Graded Bundles in the Category of Lie Groupoids %J Symmetry, integrability and geometry: methods and applications %D 2015 %V 11 %U http://geodesic.mathdoc.fr/item/SIGMA_2015_11_a89/ %G en %F SIGMA_2015_11_a89