@article{SM_1969_9_2_a10,
     author = {V. M. Tikhomirov},
     title = {Best methods of approximation and interpolation of differentiable functions in~the space $C_{[-1,1]}$},
     journal = {Sbornik. Mathematics},
     pages = {275--289},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1969_9_2_a10/}
}