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@article{MZM_1999_66_1_a5, author = {D. V. Gorbachev}, title = {The sharp {Jackson} inequality in the space $L_p$ on the sphere}, journal = {Matemati\v{c}eskie zametki}, pages = {50--62}, publisher = {mathdoc}, volume = {66}, number = {1}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_1_a5/} }
D. V. Gorbachev. The sharp Jackson inequality in the space $L_p$ on the sphere. Matematičeskie zametki, Tome 66 (1999) no. 1, pp. 50-62. http://geodesic.mathdoc.fr/item/MZM_1999_66_1_a5/