@article{TRSPY_2005_248_a22,
     author = {Yu. N. Subbotin and S. A. Telyakovskii},
     title = {On {Relative} {Widths} of {Classes} of {Differentiable} {Functions}},
     journal = {Informatics and Automation},
     pages = {250--261},
     publisher = {mathdoc},
     volume = {248},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2005_248_a22/}
}