@article{DAN_1986_288_1_a10,
     author = {S. M. Nikol'skii and P. I. Lizorkin},
     title = {Inequalities of {Bernstein} type for spherical polynomials},
     journal = {Doklady Akademii Nauk},
     pages = {50--53},
     publisher = {mathdoc},
     volume = {288},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_288_1_a10/}
}