%0 Journal Article %A Annoni, Marco %A Grafakos, Loukas %A HonzĂ­k, Petr %T On an inequality of Sagher and Zhou concerning Stein's lemma. %J Collectanea mathematica %D 2009 %P 297-306 %V 60 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CLTM_2009_2009_1_a19/ %G en %F CLTM_2009_2009_1_a19