%0 Journal Article
%A Piotr M. Hajac
%A Elmar Wagner
%T The pullbacks of principal coactions
%J Documenta mathematica
%D 2014
%P 1025-1060
%V 19
%U http://geodesic.mathdoc.fr/articles/10.4171/dm/473/
%R 10.4171/dm/473
%F 10_4171_dm_473