@article{TRSPY_1985_167_a13,
     author = {K. I. Oskolkov},
     title = {A~subsequence of {Fourier} sums of integrable functions},
     journal = {Informatics and Automation},
     pages = {239--260},
     publisher = {mathdoc},
     volume = {167},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1985_167_a13/}
}