@article{SM_1989_63_1_a15,
     author = {A. P. Petukhov},
     title = {On approximation of functions by singular integrals in the {Hausdorff} metric},
     journal = {Sbornik. Mathematics},
     pages = {229--246},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_63_1_a15/}
}