@article{IVM_1961_6_a12,
     author = {M. F. Timan},
     title = {Best approximation and modulus of smoothness of functions prescribed on the entire real axis},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {108--120},
     publisher = {mathdoc},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1961_6_a12/}
}