@article{DAN_1994_339_6_a3,
     author = {A. P. Terekhin},
     title = {An estimate for spherical approximations by local moduli of},
     journal = {Doklady Akademii Nauk},
     pages = {739--742},
     publisher = {mathdoc},
     volume = {339},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_339_6_a3/}
}