@article{VMUMM_1990_1_a3,
     author = {V. M. Fedorov},
     title = {Approximation of functions on a sphere},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {15--23},
     publisher = {mathdoc},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_1_a3/}
}