@article{JFAA_1999__5_4_59607,
     author = {James E. Daly},
     title = {A {Necessary} {Condition} for {Calder\'on-Zygmund} {Singular} {Integral} {Operators.}},
     journal = {The journal of Fourier analysis and applications [[Elektronische Ressource]]},
     pages = {303--308},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1999},
     zbl = {0979.42004},
     url = {http://geodesic.mathdoc.fr/item/JFAA_1999__5_4_59607/}
}