%0 Journal Article %A I. Assani %T Pointwise convergence of nonconventional averages %J Colloquium Mathematicum %D 2005 %P 245-262 %V 102 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm102-2-6/ %R 10.4064/cm102-2-6 %G en %F 10_4064_cm102_2_6