@article{FPM_1995_1_2_a7,
     author = {M. K. Potapov and B. V. Simonov},
     title = {On estimates for the modules of the smoothness of the functions with transformed {Fourier} series},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {455--469},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1995_1_2_a7/}
}