@article{SM_1975_25_2_a1,
     author = {B. I. Golubov},
     title = {On convergence of {Riesz} spherical means of multiple {Fourier} series},
     journal = {Sbornik. Mathematics},
     pages = {177--197},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_25_2_a1/}
}