@article{MZM_1975_17_4_a2,
     author = {B. D. Boyanov},
     title = {Best methods of interpolation for certain classes of differentiable functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {511--524},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a2/}
}