%0 Journal Article %A Adam Os/ekowski %T Weak Type Inequality for the Square Function of a Nonnegative Submartingale %J Bulletin of the Polish Academy of Sciences. Mathematics %D 2009 %P 81-89 %V 57 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ba57-1-9/ %R 10.4064/ba57-1-9 %G en %F 10_4064_ba57_1_9