@article{DAN_1975_221_6_a3,
     author = {N. K. Karapetyants and S. G. Samko},
     title = {Singular convolution operators with a discontinuous symbol},
     journal = {Doklady Akademii Nauk},
     pages = {1260--1263},
     publisher = {mathdoc},
     volume = {221},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_6_a3/}
}