@article{TM_1985_172_a20,
     author = {M. K. Potapov and V. M. Fedorov},
     title = {On {Jackson} theorems for the generalized modulus of smoothness},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {291--298},
     publisher = {mathdoc},
     volume = {172},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1985_172_a20/}
}