%0 Journal Article %A Nick Dungey %T A Littlewood–Paley–Stein estimate on graphs and groups %J Studia Mathematica %D 2008 %P 113-129 %V 189 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm189-2-3/ %R 10.4064/sm189-2-3 %G en %F 10_4064_sm189_2_3