@article{IVM_1977_2_a20,
     author = {S. G. Samko},
     title = {Spherical potentials, spherical {Riesz} differentiation, and their applications},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {135--139},
     publisher = {mathdoc},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1977_2_a20/}
}