@article{VMJ_2014_16_1_a1,
     author = {M. N. Gurov and V. A. Nogin},
     title = {Estimates for some potential type operators whose kernels have singularities on spheres},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {12--23},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2014_16_1_a1/}
}