@article{DAN_1978_243_5_a0,
     author = {K. I. Babenko},
     title = {On the asymptotics of the {Dirichlet} kernel of spherical means of multiple {Fourier} series},
     journal = {Doklady Akademii Nauk},
     pages = {1097--1100},
     publisher = {mathdoc},
     volume = {243},
     number = {5},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_5_a0/}
}