%0 Journal Article %A Wojciechowski, MichaƂ %T A Necessary Condition for Multipliers of Weak Type (1, 1) %J Canadian mathematical bulletin %D 2001 %P 121-125 %V 44 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2001-015-8/ %R 10.4153/CMB-2001-015-8 %F 10_4153_CMB_2001_015_8