@article{FAA_1975_9_4_a14,
     author = {N. Ya. Krupnik and E. P. Polonskii},
     title = {The norm of an operator of singular integration},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {73--74},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1975_9_4_a14/}
}