@article{10_4064_sm213_2_3,
     author = {Lawrence B. Difiore and Victor L. Shapiro},
     title = {A counter-example in singular integral theory},
     journal = {Studia Mathematica},
     pages = {157--167},
     publisher = {mathdoc},
     volume = {213},
     number = {2},
     year = {2012},
     doi = {10.4064/sm213-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm213-2-3/}
}