@article{PFMT_2021_4_a14,
     author = {G. N. Kazimirov},
     title = {Direct and inverse theorems of approximation theory for the generalized modulus of smoothness of some class of functions},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {92--94},
     publisher = {mathdoc},
     number = {4},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2021_4_a14/}
}