@article{DEMR_2017_8_a2,
     author = {G. G. Akniev},
     title = {Approximation of piecewise linear functions by discrete {Fourier} sums},
     journal = {Daghestan Electronic Mathematical Reports},
     pages = {21--26},
     publisher = {mathdoc},
     volume = {8},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DEMR_2017_8_a2/}
}