@article{10_4064_sm182_2_1,
     author = {Sandra Pot},
     title = {{A sufficient condition for the boundedness 
of operator-weighted martingale transforms and {Hilbert} transform},
     journal = {Studia Mathematica},
     pages = {99--111},
     publisher = {mathdoc},
     volume = {182},
     number = {2},
     year = {2007},
     doi = {10.4064/sm182-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm182-2-1/}
}