@article{ZNSL_2007_350_a5,
     author = {V. V. Zhuk},
     title = {Approximating periodic functions in {H\"older} type metrics by the {Fourier} sums and the {Riesz} means},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {70--88},
     year = {2007},
     volume = {350},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2007_350_a5/}
}