@article{FAA_2012_46_2_a5,
     author = {V. V. Lebedev},
     title = {Absolutely {Convergent} {Fourier} {Series.} {An} {Improvement} of the {Beurling--Helson} {Theorem}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {52--65},
     publisher = {mathdoc},
     volume = {46},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2012_46_2_a5/}
}