@article{10_4153_CMB_2001_015_8,
     author = {Wojciechowski, Micha{\l}},
     title = {A {Necessary} {Condition} for {Multipliers} of {Weak} {Type} (1, 1)},
     journal = {Canadian mathematical bulletin},
     pages = {121--125},
     year = {2001},
     volume = {44},
     number = {1},
     doi = {10.4153/CMB-2001-015-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2001-015-8/}
}