@article{MZM_1982_32_3_a2,
     author = {A. I. Kamzolov},
     title = {The best approximation of the classes of functions $W_p^\alpha(S^n)$ by polynomials in spherical harmonics},
     journal = {Matemati\v{c}eskie zametki},
     pages = {285--293},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1982_32_3_a2/}
}