@article{MZM_2001_70_4_a15,
     author = {N. T. Tleukhanova},
     title = {On {Hardy} and {Bellman} {Transformations} for {Orthogonal} {Fourier} {Series}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {638--640},
     publisher = {mathdoc},
     volume = {70},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_70_4_a15/}
}