@article{MZM_1987_41_4_a7,
     author = {S. M. Nikol'skii and P. I. Lizorkin},
     title = {Functional spaces on the sphere, related with approximation theory},
     journal = {Matemati\v{c}eskie zametki},
     pages = {509--516},
     publisher = {mathdoc},
     volume = {41},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1987_41_4_a7/}
}