@article{DAN_1975_225_2_a2,
     author = {L. V. Zhizhiashvili},
     title = {On simple and multiple {Fourier} series},
     journal = {Doklady Akademii Nauk},
     pages = {256--258},
     year = {1975},
     volume = {225},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_2_a2/}
}