@article{TM_2001_232_a23,
     author = {M. K. Potapov},
     title = {Direct and {Inverse} {Theorems} of {Approximation} {Theory} for the $m$th {Generalized} {Modulus} of {Smoothness}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {289--297},
     year = {2001},
     volume = {232},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2001_232_a23/}
}