@article{MZM_1998_63_3_a13,
     author = {M. K. Potapov and G. N. Kazimirov},
     title = {Polynomial approximation of functions with given order of the $k$th generalized modulus of smoothness},
     journal = {Matemati\v{c}eskie zametki},
     pages = {425--436},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1998_63_3_a13/}
}