@article{DAN_1987_294_4_a3,
     author = {Kh. P. Rustamov},
     title = {On direct and inverse theorems for the best $L_p$-approximation on a sphere},
     journal = {Doklady Akademii Nauk},
     pages = {788--791},
     publisher = {mathdoc},
     volume = {294},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_294_4_a3/}
}