%0 Journal Article %A Michael Hochman %T A ratio ergodic theorem for multiparameter non-singular actions %J Journal of the European Mathematical Society %D 2010 %P 365-383 %V 12 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/201/ %R 10.4171/jems/201 %F JEMS_2010_12_2_a3