@article{MZM_2010_87_5_a2,
     author = {V. F. Babenko and N. V. Parfinovich},
     title = {On the {Exact} {Values} of the {Best} {Approximations} of {Classes} of {Differentiable} {Periodic} {Functions} by {Splines}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {669--683},
     publisher = {mathdoc},
     volume = {87},
     number = {5},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2010_87_5_a2/}
}